diff --git a/mindspore/_extends/graph_kernel/expander.py b/mindspore/_extends/graph_kernel/expander.py
index c4021c05b0..115e1f0617 100644
--- a/mindspore/_extends/graph_kernel/expander.py
+++ b/mindspore/_extends/graph_kernel/expander.py
@@ -18,6 +18,16 @@ import json.decoder as jd
 import traceback
 from mindspore import log as logger
 import mindspore._extends.graph_kernel.expanders as expanders
+from mindspore._extends.graph_kernel.model.model import GraphKernelUnsupportedException
+
+
+def create_expander(expand_info):
+    """Create an expander according to op name"""
+    op_name = str(expand_info['name'])
+    if not hasattr(expanders, op_name):
+        raise GraphKernelUnsupportedException("Generator do not support op: {}".format(op_name))
+    expander = getattr(expanders, op_name)
+    return expander(expand_info)
 
 
 def extract_expand_info(kernel_info):
@@ -46,20 +56,8 @@ def get_op_expander(json_str: str):
         kernel_info = json.loads(json_str)
         expand_info = extract_expand_info(kernel_info)
 
-        processor = expand_info['process']
-        op_name = str(expand_info['name']).lower()
-        expand_op_func_name = 'expand_' + op_name
-        if not hasattr(expanders, expand_op_func_name):
-            logger.error("Generator do not support op: {}".format(op_name))
-            return None
-        expand_op_func = getattr(expanders, expand_op_func_name)
-        # generate graph desc.
-        graph = expand_op_func(expand_info)
-        if graph is None:
-            logger.error("Failed to generate graph of: {}".format(op_name))
-            return None
-
-        graph.set_processor(processor)
+        expander = create_expander(expand_info)
+        graph = expander.run()
 
         # dump graph to json desc.
         desc = graph.dump()
@@ -69,3 +67,6 @@ def get_op_expander(json_str: str):
         logger.error("Failed to generate graph kernel op")
         logger.error(traceback.format_exc())
         return None
+    except GraphKernelUnsupportedException as e:
+        logger.info(e.message)
+        return ""
diff --git a/mindspore/_extends/graph_kernel/expanders/__init__.py b/mindspore/_extends/graph_kernel/expanders/__init__.py
index 848c25d077..850a58c0e5 100644
--- a/mindspore/_extends/graph_kernel/expanders/__init__.py
+++ b/mindspore/_extends/graph_kernel/expanders/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2020 Huawei Technologies Co., Ltd
+# Copyright 2020-2021 Huawei Technologies Co., Ltd
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -14,24 +14,24 @@
 # ============================================================================
 """expanders init"""
 
-from .gelu import expand_gelu
-from .gelu_grad import expand_gelugrad
-from .layernorm import expand_layernorm
-from .softmax import expand_softmax
-from .square import expand_square
-from .bias_add import expand_biasadd
-from .bias_add_grad import expand_biasaddgrad
-from .fused_adam import expand_fusedadam
-from .fused_adam_weight_decay import expand_fusedadamweightdecay
-from .reduce_mean import expand_reducemean
-from .tanh_grad import expand_tanhgrad
-from .maximum_grad import expand_maximumgrad
-from .minimum_grad import expand_minimumgrad
-from .dropout_grad import expand_dropoutgrad
-from .layernorm_grad import expand_layernormgrad
-from .logsoftmax import expand_logsoftmax
-from .logsoftmax_grad import expand_logsoftmaxgrad
-from .gkdropout import expand_gkdropout
-from .tile import expand_tile
-from .sqrt_grad import expand_sqrtgrad
-from .clip_by_norm_no_div_sum import expand_clipbynormnodivsum
+from .bias_add import BiasAdd
+from .bias_add_grad import BiasAddGrad
+from .clip_by_norm_no_div_sum import ClipByNormNoDivSum
+from .dropout_grad import DropoutGrad
+from .fused_adam import FusedAdam
+from .fused_adam_weight_decay import FusedAdamWeightDecay
+from .gelu import GeLU
+from .gelu_grad import GeLUGrad
+from .gkdropout import GkDropout
+from .layernorm import LayerNorm
+from .layernorm_grad import LayerNormGrad
+from .logsoftmax import LogSoftmax
+from .logsoftmax_grad import LogSoftmaxGrad
+from .maximum_grad import MaximumGrad
+from .minimum_grad import MinimumGrad
+from .reduce_mean import ReduceMean
+from .softmax import Softmax
+from .sqrt_grad import SqrtGrad
+from .square import Square
+from .tanh_grad import TanhGrad
+from .tile import Tile
diff --git a/mindspore/_extends/graph_kernel/expanders/_utils.py b/mindspore/_extends/graph_kernel/expanders/_utils.py
new file mode 100644
index 0000000000..803f7ade8e
--- /dev/null
+++ b/mindspore/_extends/graph_kernel/expanders/_utils.py
@@ -0,0 +1,146 @@
+# Copyright 2021 Huawei Technologies Co., Ltd
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# ===========================================================================
+"""GraphKernel expander utils"""
+from abc import ABCMeta, abstractmethod
+from mindspore._extends.graph_kernel.model import model_builder as builder
+from mindspore._extends.graph_kernel.model.model import GraphKernelUnsupportedException as GKException
+
+
+class Expander:
+    """
+    Expander is the base class of expanders.
+
+    The method `_expand` should be overridden to implement the operator detail.
+    """
+    __metaclass__ = ABCMeta
+
+    def __init__(self, expand_info):
+        self.name = expand_info["name"]
+        self.inputs = expand_info["input_desc"]
+        self.outputs = expand_info["output_desc"]
+        self.attrs = expand_info["attr"]
+        self.processor = expand_info["process"]
+
+    def run(self):
+        """
+        Expand the operator to a graph.
+
+        `GraphKernelUnsupportedException` would be raised if check failed.
+        """
+        self._check()
+        graph_builder = builder.GraphBuilder()
+        with graph_builder.graph_scope(self.name) as graph_scope:
+            # transform input_desc to Tensor
+            self.inputs = [graph_builder.tensor(inp['shape'], inp['data_type'], inp['format']) for inp in self.inputs]
+            graph_scope.set_input(*self.inputs)
+            outputs = self._expand(graph_builder)
+            if isinstance(outputs, (list, tuple)):
+                graph_scope.set_output(*outputs)
+            else:
+                graph_scope.set_output(outputs)
+
+        graph = graph_builder.get()[0]
+        graph.set_processor(self.processor)
+        return graph
+
+    def _check(self):
+        """Check inputs"""
+
+    @abstractmethod
+    def _expand(self, graph_builder):
+        """Expand operator, this function should be overridden in subclass"""
+        raise Exception("_expand() is not implemented in {}".format(self.__class__.__name__))
+
+
+class ExpanderInfoValidator:
+    """ExpanderInfoValidator is the utility class which defines the validator decorator for expanders"""
+    # pylint: disable=W0211
+    @staticmethod
+    def _add_check_function(cls, func):
+        """
+        Rewrite the function `_check` in class Expander
+        to append the new `func` after the original checks.
+        """
+        old_check = getattr(cls, "_check")
+
+        def new_check(obj):
+            old_check(obj)
+            func(obj)
+        setattr(cls, "_check", new_check)
+
+    @staticmethod
+    def add_format(*input_format):
+        """
+        Add new supported format for the operator
+
+        this function will add a list `__supported_formats` into the expander,
+        saving the whitelist of formats that this op supports.
+        it also rewrites the `_check` function to check the formats.
+        """
+        format_list_name = "__supported_formats"
+
+        def _check_format(obj):
+            inp_formats = [inp['format'] for inp in obj.inputs]
+            for formats in getattr(obj, format_list_name):
+                if len(formats) != len(inp_formats):
+                    raise GKException("length of registered format doesn't match with the input of {}".format(obj.name))
+                if all([fmt == inp for fmt, inp in zip(formats, inp_formats)]):
+                    return
+            raise GKException("Unregistered format ({}) for op {}".format(','.join(inp_formats), obj.name))
+
+        def wrapper(cls):
+            if not issubclass(cls, Expander):
+                raise Exception("{} should be subclass of Expander.".format(cls.__name__))
+            if not hasattr(cls, format_list_name):
+                setattr(cls, format_list_name, list())
+                ExpanderInfoValidator._add_check_function(cls, _check_format)
+            getattr(cls, format_list_name).append(input_format)
+            return cls
+
+        return wrapper
+
+    @staticmethod
+    def check_all_formats_same(cls):
+        """Check that all formats are the same"""
+        def _check_format(obj):
+            inp_formats = [inp['format'] for inp in obj.inputs]
+            if all([fmt == inp_formats[0] for fmt in inp_formats[1:]]):
+                return
+            raise GKException("[check_all_formats_same] unmatched formats ({}) for op {}".format(
+                ','.join(inp_formats), obj.name))
+
+        def wrapper(*args, **kargs):
+            if not issubclass(cls, Expander):
+                raise Exception("{} should be subclass of Expander.".format(cls.__name__))
+            ExpanderInfoValidator._add_check_function(cls, _check_format)
+            return cls(*args, **kargs)
+
+        return wrapper
+
+    @staticmethod
+    def check_attrs(*args):
+        """Check the attrs exist"""
+        def _check_attr(obj):
+            for a in args:
+                if a not in obj.attrs:
+                    raise GKException("attr '{}' does not exist.".format(a))
+
+        def wrapper(cls):
+            if not issubclass(cls, Expander):
+                raise Exception("{} should be subclass of Expander.".format(cls.__name__))
+            ExpanderInfoValidator._add_check_function(cls, _check_attr)
+            return cls
+
+        return wrapper
diff --git a/mindspore/_extends/graph_kernel/expanders/bias_add.py b/mindspore/_extends/graph_kernel/expanders/bias_add.py
index 8f51168eee..af95a99be8 100644
--- a/mindspore/_extends/graph_kernel/expanders/bias_add.py
+++ b/mindspore/_extends/graph_kernel/expanders/bias_add.py
@@ -1,4 +1,4 @@
-# Copyright 2020 Huawei Technologies Co., Ltd
+# Copyright 2020-2021 Huawei Technologies Co., Ltd
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -13,50 +13,34 @@
 # limitations under the License.
 # ===========================================================================
 """generate json desc for bias_add"""
-from mindspore._extends.graph_kernel.model import model_builder as builder
+from mindspore._extends.graph_kernel.model.model import DataFormat as DF
+from ._utils import Expander, ExpanderInfoValidator as VLD
 
 
-def expand_biasadd(expand_info):
+@VLD.add_format(DF.DEFAULT, DF.DEFAULT)
+@VLD.add_format(DF.NCHW, DF.DEFAULT)
+@VLD.add_format(DF.NHWC, DF.DEFAULT)
+class BiasAdd(Expander):
     """BiasAdd expander"""
 
-    # get op info.
-    input_desc_0 = expand_info['input_desc'][0]
-    input_desc_1 = expand_info['input_desc'][1]
-    graph_builder = builder.GraphBuilder()
-    # generate a graph.
-    with graph_builder.graph_scope('main') as graph_scope:
-        # create tensor input.
-        input_x = graph_builder.tensor(
-            input_desc_0['shape'], input_desc_0['data_type'], input_desc_0['format'])
-        input_y = graph_builder.tensor(
-            input_desc_1['shape'], input_desc_1['data_type'], input_desc_1['format'])
-        graph_scope.set_input(input_x, input_y)
-        if input_x.data_format == "NCHW":
-            input_y_expand = graph_builder.emit(
-                'ExpandDims', [input_y], attrs={'axis': 1})
-            input_y_expand = graph_builder.emit(
-                'ExpandDims', [input_y_expand], attrs={'axis': 2})
+    def _expand(self, graph_builder):
+        input_x, input_y = self.inputs
+
+        if input_x.data_format == DF.NCHW:
+            input_y_expand = graph_builder.emit('ExpandDims', [input_y], attrs={'axis': 1})
+            input_y_expand = graph_builder.emit('ExpandDims', [input_y_expand], attrs={'axis': 2})
             result = graph_builder.emit('Add', [input_x, input_y_expand])
-        elif input_x.data_format == "DefaultFormat":
+        elif input_x.data_format == DF.DEFAULT:
             if len(input_x.shape) == 2:
                 result = graph_builder.emit('Add', [input_x, input_y])
             elif len(input_x.shape) == 3:
-                input_y_expand = graph_builder.emit(
-                    'ExpandDims', [input_y], attrs={'axis': 1})
-                result = graph_builder.emit(
-                    'Add', [input_x, input_y_expand])
-            else:
-                input_y_expand = graph_builder.emit(
-                    'ExpandDims', [input_y], attrs={'axis': 1})
-                input_y_expand = graph_builder.emit(
-                    'ExpandDims', [input_y_expand], attrs={'axis': 2})
-                result = graph_builder.emit(
-                    'Add', [input_x, input_y_expand])
-        else:
+                input_y_expand = graph_builder.emit('ExpandDims', [input_y], attrs={'axis': 1})
+                result = graph_builder.emit('Add', [input_x, input_y_expand])
+            else:  # len == 4
+                input_y_expand = graph_builder.emit('ExpandDims', [input_y], attrs={'axis': 1})
+                input_y_expand = graph_builder.emit('ExpandDims', [input_y_expand], attrs={'axis': 2})
+                result = graph_builder.emit('Add', [input_x, input_y_expand])
+        else:  # NHWC
             result = graph_builder.emit('Add', [input_x, input_y])
 
-        # set graph output.
-        graph_scope.set_output(result)
-
-    graph = graph_builder.get()[0]
-    return graph
+        return result
diff --git a/mindspore/_extends/graph_kernel/expanders/bias_add_grad.py b/mindspore/_extends/graph_kernel/expanders/bias_add_grad.py
index 218e8c89be..9d9163efc9 100644
--- a/mindspore/_extends/graph_kernel/expanders/bias_add_grad.py
+++ b/mindspore/_extends/graph_kernel/expanders/bias_add_grad.py
@@ -1,4 +1,4 @@
-# Copyright 2020 Huawei Technologies Co., Ltd
+# Copyright 2020-2021 Huawei Technologies Co., Ltd
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -13,26 +13,25 @@
 # limitations under the License.
 # ===========================================================================
 """generate json desc for bias_add"""
-from mindspore._extends.graph_kernel.model import model_builder as builder
+from mindspore._extends.graph_kernel.model.model import DataFormat as DF
+from ._utils import Expander, ExpanderInfoValidator as VLD
 
 
-def expand_biasaddgrad(expand_info):
+@VLD.add_format(DF.DEFAULT)
+@VLD.add_format(DF.NHWC)
+@VLD.add_format(DF.NCHW)
+class BiasAddGrad(Expander):
     """BiasAddGrad expander"""
-    # get op info.
-    input_desc_0 = expand_info['input_desc'][0]
-    graph_builder = builder.GraphBuilder()
-    # generate a graph.
-    with graph_builder.graph_scope('main') as graph_scope:
-        # create tensor input.
-        input_x = graph_builder.tensor(
-            input_desc_0['shape'], input_desc_0['data_type'], input_desc_0['format'])
-        graph_scope.set_input(input_x)
+
+    def _expand(self, graph_builder):
+        input_x = self.inputs[0]
+
         reduce_axis = ()
         if input_x.data_format == 'NHWC':
             reduce_axis = (0, 1, 2)
         elif input_x.data_format == 'NCHW':
             reduce_axis = (0, 2, 3)
-        # Default format shape's length maybe equal 2 to 4, so different shape's length reduce axis are differnet
+        # DefaultFormat shape's length should be from 2 to 4
         else:
             if len(input_x.shape) == 2:
                 reduce_axis = (0,)
@@ -41,8 +40,4 @@ def expand_biasaddgrad(expand_info):
             else:
                 reduce_axis = (0, 2, 3)
         result = graph_builder.emit('ReduceSum', [input_x], attrs={'reduce_axis': reduce_axis, 'keep_dims': False})
-        # set graph output.
-        graph_scope.set_output(result)
-
-    graph = graph_builder.get()[0]
-    return graph
+        return result
diff --git a/mindspore/_extends/graph_kernel/expanders/clip_by_norm_no_div_sum.py b/mindspore/_extends/graph_kernel/expanders/clip_by_norm_no_div_sum.py
index ae5013e8cf..b8138a3b34 100644
--- a/mindspore/_extends/graph_kernel/expanders/clip_by_norm_no_div_sum.py
+++ b/mindspore/_extends/graph_kernel/expanders/clip_by_norm_no_div_sum.py
@@ -1,4 +1,4 @@
-# Copyright 2020 Huawei Technologies Co., Ltd
+# Copyright 2020-2021 Huawei Technologies Co., Ltd
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -13,27 +13,15 @@
 # limitations under the License.
 # ===========================================================================
 """generate json desc for ClipByNormNoDivSum"""
-from mindspore._extends.graph_kernel.model import model_builder as builder
+from ._utils import Expander, ExpanderInfoValidator as VLD
 
 
-def expand_clipbynormnodivsum(expand_info):
+@VLD.check_all_formats_same
+class ClipByNormNoDivSum(Expander):
     """ClipByNormNoDivSum expander"""
 
-    # get op info.
-    input_desc_0 = expand_info['input_desc'][0]
-    input_desc_1 = expand_info['input_desc'][1]
-    input_desc_2 = expand_info['input_desc'][2]
-    input_desc_3 = expand_info['input_desc'][3]
-    graph_builder = builder.GraphBuilder()
-
-    # generate a graph.
-    with graph_builder.graph_scope('main') as graph_scope:
-        # create tensor input.
-        input_x0 = graph_builder.tensor(input_desc_0['shape'], input_desc_0['data_type'], input_desc_0['format'])
-        input_x1 = graph_builder.tensor(input_desc_1['shape'], input_desc_1['data_type'], input_desc_1['format'])
-        input_x2 = graph_builder.tensor(input_desc_2['shape'], input_desc_2['data_type'], input_desc_2['format'])
-        input_x3 = graph_builder.tensor(input_desc_3['shape'], input_desc_3['data_type'], input_desc_3['format'])
-        graph_scope.set_input(input_x0, input_x1, input_x2, input_x3)
+    def _expand(self, graph_builder):
+        input_x0, input_x1, input_x2, input_x3 = self.inputs
 
         # cal result
         greater_res = graph_builder.emit('Greater', [input_x0, input_x1], attrs={'fusion': 'SelectGT_000'})
@@ -44,8 +32,4 @@ def expand_clipbynormnodivsum(expand_info):
                                          attrs={'fusion': 'SelectGT_000_end'})
         result = graph_builder.emit('Maximum', [select_res1, input_x3])
 
-        # set graph output.
-        graph_scope.set_output(result)
-
-    graph = graph_builder.get()[0]
-    return graph
+        return result
diff --git a/mindspore/_extends/graph_kernel/expanders/dropout_grad.py b/mindspore/_extends/graph_kernel/expanders/dropout_grad.py
index 960ab2e2c0..ac7a011f3f 100644
--- a/mindspore/_extends/graph_kernel/expanders/dropout_grad.py
+++ b/mindspore/_extends/graph_kernel/expanders/dropout_grad.py
@@ -13,27 +13,18 @@
 # limitations under the License.
 # ===========================================================================
 """generate json desc for DropoutGrad"""
-from mindspore._extends.graph_kernel.model import model_builder as builder
+from ._utils import Expander, ExpanderInfoValidator as VLD
 
 
-def expand_dropoutgrad(expand_info):
+@VLD.check_all_formats_same
+@VLD.check_attrs('keep_prob')
+class DropoutGrad(Expander):
     """DropoutGrad expander"""
-    # get op info.
-    dy_desc = expand_info['input_desc'][0]
-    mask_desc = expand_info['input_desc'][1]
-    keep_prob = expand_info['attr']['keep_prob']
 
-    graph_builder = builder.GraphBuilder()
-    with graph_builder.graph_scope('main') as graph_scope:
-        # create tensor input.
-        input_dy = graph_builder.tensor(dy_desc['shape'], dy_desc['data_type'], dy_desc['format'])
-        input_mask = graph_builder.tensor(mask_desc['shape'], mask_desc['data_type'], mask_desc['format'])
-        graph_scope.set_input(input_dy, input_mask)
+    def _expand(self, graph_builder):
+        input_dy, input_mask = self.inputs
+        keep_prob = self.attrs['keep_prob']
         r_keep_prob = graph_builder.value(input_dy.dtype, 1.0 / keep_prob)
-        # create op.
         result = graph_builder.emit('Mul', [input_dy, r_keep_prob])
         result = graph_builder.emit('Mul', [result, input_mask])
-        # set graph output.
-        graph_scope.set_output(result)
-    graph = graph_builder.get()[0]
-    return graph
+        return result
diff --git a/mindspore/_extends/graph_kernel/expanders/fused_adam.py b/mindspore/_extends/graph_kernel/expanders/fused_adam.py
index e2ef30abaf..c424f0aae3 100644
--- a/mindspore/_extends/graph_kernel/expanders/fused_adam.py
+++ b/mindspore/_extends/graph_kernel/expanders/fused_adam.py
@@ -1,4 +1,4 @@
-# Copyright 2020 Huawei Technologies Co., Ltd
+# Copyright 2020-2021 Huawei Technologies Co., Ltd
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -13,40 +13,16 @@
 # limitations under the License.
 # ===========================================================================
 """generate json desc for fused_adam"""
-from mindspore._extends.graph_kernel.model import model_builder as builder
+from ._utils import Expander, ExpanderInfoValidator as VLD
 
 
-def expand_fusedadam(expand_info):
-    """FusedAdma expander"""
-    # get op info.
-    input_desc_0 = expand_info['input_desc'][0]
-    input_desc_1 = expand_info['input_desc'][1]
-    input_desc_2 = expand_info['input_desc'][2]
-    input_desc_3 = expand_info['input_desc'][3]
-    input_desc_4 = expand_info['input_desc'][4]
-    input_desc_5 = expand_info['input_desc'][5]
-    input_desc_6 = expand_info['input_desc'][6]
-    input_desc_7 = expand_info['input_desc'][7]
-    input_desc_8 = expand_info['input_desc'][8]
-    input_desc_9 = expand_info['input_desc'][9]
-    graph_builder = builder.GraphBuilder()
+@VLD.check_all_formats_same
+class FusedAdam(Expander):
+    """FusedAdam expander"""
 
-    # generate a graph.
-    with graph_builder.graph_scope('main') as graph_scope:
-        # create tensor input.
-        beta_1 = graph_builder.tensor(input_desc_0['shape'], input_desc_0['data_type'], input_desc_0['format'])
-        one_sub_beta_1 = graph_builder.tensor(input_desc_1['shape'], input_desc_1['data_type'], input_desc_1['format'])
-        beta_2 = graph_builder.tensor(input_desc_2['shape'], input_desc_2['data_type'], input_desc_2['format'])
-        one_sub_beta_2 = graph_builder.tensor(input_desc_3['shape'], input_desc_3['data_type'], input_desc_3['format'])
-        eps = graph_builder.tensor(input_desc_4['shape'], input_desc_4['data_type'], input_desc_4['format'])
-        lr = graph_builder.tensor(input_desc_5['shape'], input_desc_5['data_type'], input_desc_5['format'])
-        param = graph_builder.tensor(input_desc_6['shape'], input_desc_6['data_type'], input_desc_6['format'])
-        m = graph_builder.tensor(input_desc_7['shape'], input_desc_7['data_type'], input_desc_7['format'])
-        v = graph_builder.tensor(input_desc_8['shape'], input_desc_8['data_type'], input_desc_8['format'])
-        gradient = graph_builder.tensor(input_desc_9['shape'], input_desc_9['data_type'], input_desc_9['format'])
-        graph_scope.set_input(beta_1, one_sub_beta_1, beta_2, one_sub_beta_2, eps, lr, param, m, v, gradient)
+    def _expand(self, graph_builder):
+        beta_1, one_sub_beta_1, beta_2, one_sub_beta_2, eps, lr, param, m, v, gradient = self.inputs
 
-        # compute result
         beta_1_mul_m = graph_builder.emit('Mul', [beta_1, m])
         one_sub_beta_1_mul_grad = graph_builder.emit('Mul', [one_sub_beta_1, gradient])
         next_m = graph_builder.emit('Add', [beta_1_mul_m, one_sub_beta_1_mul_grad])
@@ -60,12 +36,9 @@ def expand_fusedadam(expand_info):
         update_with_lr = graph_builder.emit('Mul', [lr, update])
         next_para = graph_builder.emit('Sub', [param, update_with_lr])
 
-        param_result = graph_builder.emit('InplaceAssign', [param, next_para, next_para], attrs={'fake_output': True})
+        param_result = graph_builder.emit(
+            'InplaceAssign', [param, next_para, next_para], attrs={'fake_output': True})
         param_result = graph_builder.emit('InplaceAssign', [m, next_m, param_result], attrs={'fake_output': True})
         param_result = graph_builder.emit('InplaceAssign', [v, next_v, param_result], attrs={'fake_output': True})
 
-        # set graph output.
-        graph_scope.set_output(param_result)
-
-    graph = graph_builder.get()[0]
-    return graph
+        return param_result
diff --git a/mindspore/_extends/graph_kernel/expanders/fused_adam_weight_decay.py b/mindspore/_extends/graph_kernel/expanders/fused_adam_weight_decay.py
index 3a8c811531..5359806852 100644
--- a/mindspore/_extends/graph_kernel/expanders/fused_adam_weight_decay.py
+++ b/mindspore/_extends/graph_kernel/expanders/fused_adam_weight_decay.py
@@ -1,4 +1,4 @@
-# Copyright 2020 Huawei Technologies Co., Ltd
+# Copyright 2020-2021 Huawei Technologies Co., Ltd
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -13,41 +13,15 @@
 # limitations under the License.
 # ===========================================================================
 """generate json desc for fused_adam_weight_decay"""
-from mindspore._extends.graph_kernel.model import model_builder as builder
+from ._utils import Expander, ExpanderInfoValidator as VLD
 
 
-def expand_fusedadamweightdecay(expand_info):
-    """FusedAdmaWeightDecay expander"""
-    # get op info.
-    input_desc_0 = expand_info['input_desc'][0]
-    input_desc_1 = expand_info['input_desc'][1]
-    input_desc_2 = expand_info['input_desc'][2]
-    input_desc_3 = expand_info['input_desc'][3]
-    input_desc_4 = expand_info['input_desc'][4]
-    input_desc_5 = expand_info['input_desc'][5]
-    input_desc_6 = expand_info['input_desc'][6]
-    input_desc_7 = expand_info['input_desc'][7]
-    input_desc_8 = expand_info['input_desc'][8]
-    input_desc_9 = expand_info['input_desc'][9]
-    input_desc_10 = expand_info['input_desc'][10]
-    graph_builder = builder.GraphBuilder()
+@VLD.check_all_formats_same
+class FusedAdamWeightDecay(Expander):
+    """FusedAdamWeightDecay expander"""
 
-    # generate a graph.
-    with graph_builder.graph_scope('main') as graph_scope:
-        # create tensor input.
-        beta_1 = graph_builder.tensor(input_desc_0['shape'], input_desc_0['data_type'], input_desc_0['format'])
-        one_sub_beta_1 = graph_builder.tensor(input_desc_1['shape'], input_desc_1['data_type'], input_desc_1['format'])
-        beta_2 = graph_builder.tensor(input_desc_2['shape'], input_desc_2['data_type'], input_desc_2['format'])
-        one_sub_beta_2 = graph_builder.tensor(input_desc_3['shape'], input_desc_3['data_type'], input_desc_3['format'])
-        eps = graph_builder.tensor(input_desc_4['shape'], input_desc_4['data_type'], input_desc_4['format'])
-        lr = graph_builder.tensor(input_desc_5['shape'], input_desc_5['data_type'], input_desc_5['format'])
-        param = graph_builder.tensor(input_desc_6['shape'], input_desc_6['data_type'], input_desc_6['format'])
-        m = graph_builder.tensor(input_desc_7['shape'], input_desc_7['data_type'], input_desc_7['format'])
-        v = graph_builder.tensor(input_desc_8['shape'], input_desc_8['data_type'], input_desc_8['format'])
-        gradient = graph_builder.tensor(input_desc_9['shape'], input_desc_9['data_type'], input_desc_9['format'])
-        weight_decay = graph_builder.tensor(input_desc_10['shape'], input_desc_10['data_type'], input_desc_10['format'])
-        graph_scope.set_input(beta_1, one_sub_beta_1, beta_2, one_sub_beta_2,
-                              eps, lr, param, m, v, gradient, weight_decay)
+    def _expand(self, graph_builder):
+        beta_1, one_sub_beta_1, beta_2, one_sub_beta_2, eps, lr, param, m, v, gradient, weight_decay = self.inputs
 
         # compute result
         beta_1_mul_m = graph_builder.emit('Mul', [beta_1, m])
@@ -65,12 +39,9 @@ def expand_fusedadamweightdecay(expand_info):
         update_with_lr = graph_builder.emit('Mul', [lr, update])
         next_para = graph_builder.emit('Sub', [param, update_with_lr])
 
-        para_result = graph_builder.emit('InplaceAssign', [param, next_para, next_para], attrs={'fake_output': True})
+        para_result = graph_builder.emit(
+            'InplaceAssign', [param, next_para, next_para], attrs={'fake_output': True})
         para_result = graph_builder.emit('InplaceAssign', [m, next_m, para_result], attrs={'fake_output': True})
         para_result = graph_builder.emit('InplaceAssign', [v, next_v, para_result], attrs={'fake_output': True})
 
-        # set graph output.
-        graph_scope.set_output(para_result)
-
-    graph = graph_builder.get()[0]
-    return graph
+        return para_result
diff --git a/mindspore/_extends/graph_kernel/expanders/gelu.py b/mindspore/_extends/graph_kernel/expanders/gelu.py
index 4b9760575d..8242413c4d 100644
--- a/mindspore/_extends/graph_kernel/expanders/gelu.py
+++ b/mindspore/_extends/graph_kernel/expanders/gelu.py
@@ -13,49 +13,36 @@
 # limitations under the License.
 # ===========================================================================
 """generate json desc for gelu"""
-from mindspore._extends.graph_kernel.model import model_builder as builder
+from ._utils import Expander
 
-CSVALUE = 0.044715
-CSVALUE_SQRT_TWO_DIV_PI = 0.7978845608028564  # np.sqrt(2/np.pi)
-ONE = 1.0
-HALF = 0.5
 
-
-def expand_gelu(expand_info):
+class GeLU(Expander):
     """GeLU expander"""
-    # cal formula are:
-    # gelu(x) is 0.5 * x * (1.0 + tanh(y))
-    # y is sqrt(2.0 / pi) * (x + 0.044715 * x * x * x)
+    CSVALUE = 0.044715
+    CSVALUE_SQRT_TWO_DIV_PI = 0.7978845608028564  # np.sqrt(2/np.pi)
 
-    # get op info.
-    input_desc = expand_info['input_desc'][0]
-    graph_builder = builder.GraphBuilder()
+    def _expand(self, graph_builder):
+        # cal formula are:
+        # gelu(x) is 0.5 * x * (1.0 + tanh(y))
+        # y is sqrt(2.0 / pi) * (x + 0.044715 * x * x * x)
 
-    # generate a graph.
-    with graph_builder.graph_scope('main') as graph_scope:
-        # create tensor input.
-        input_x = graph_builder.tensor(input_desc['shape'], input_desc['data_type'], input_desc['format'])
-        graph_scope.set_input(input_x)
+        input_x = self.inputs[0]
 
         # cal y
         mul_0 = graph_builder.emit('Mul', [input_x, input_x])
         pow_0 = graph_builder.emit('Mul', [mul_0, input_x])
-        const_csvalue = graph_builder.value(pow_0.dtype, CSVALUE)
+        const_csvalue = graph_builder.value(pow_0.dtype, self.CSVALUE)
         mul_1 = graph_builder.emit('Mul', [pow_0, const_csvalue])
         tanh_res = graph_builder.emit('Add', [input_x, mul_1])
-        const_csvalue_sqrt_two_div_pi = graph_builder.value(tanh_res.dtype, CSVALUE_SQRT_TWO_DIV_PI)
+        const_csvalue_sqrt_two_div_pi = graph_builder.value(tanh_res.dtype, self.CSVALUE_SQRT_TWO_DIV_PI)
         y = graph_builder.emit('Mul', [tanh_res, const_csvalue_sqrt_two_div_pi])
 
         # cal gelu(x)
         tanh_y = graph_builder.emit('Tanh', [y])
-        const_one = graph_builder.value(tanh_y.dtype, ONE)
-        const_half = graph_builder.value(tanh_y.dtype, HALF)
+        const_one = graph_builder.value(tanh_y.dtype, 1)
+        const_half = graph_builder.value(tanh_y.dtype, 0.5)
         tanh_y_add_one = graph_builder.emit('Add', [tanh_y, const_one])
         mul_x = graph_builder.emit('Mul', [input_x, tanh_y_add_one])
         result = graph_builder.emit('Mul', [const_half, mul_x])
 
-        # set graph output.
-        graph_scope.set_output(result)
-
-    graph = graph_builder.get()[0]
-    return graph
+        return result
diff --git a/mindspore/_extends/graph_kernel/expanders/gelu_grad.py b/mindspore/_extends/graph_kernel/expanders/gelu_grad.py
index 096c5ebfa4..cec69d6719 100644
--- a/mindspore/_extends/graph_kernel/expanders/gelu_grad.py
+++ b/mindspore/_extends/graph_kernel/expanders/gelu_grad.py
@@ -13,43 +13,31 @@
 # limitations under the License.
 # ===========================================================================
 """generate json desc for gelugrad"""
-from mindspore._extends.graph_kernel.model import model_builder as builder
+from ._utils import Expander, ExpanderInfoValidator as VLD
 
-CSVALUE = 0.044715
-CSVALUE_SQRT_TWO_DIV_PI = 0.7978845608028564  # np.sqrt(2/np.pi)
-CSVALUE_TRI = 0.134141  # CSVALUE * 3
-ONE = 1.0
-HALF = 0.5
 
-
-def expand_gelugrad(expand_info):
+@VLD.check_all_formats_same
+class GeLUGrad(Expander):
     """GeLUGrad expander"""
-    # cal formula are:
-    # gelu_grad(dy, x) is dy * y'
-    # y' is 0.5 * (1.0 + tanh(tanh_para)) + 0.5 * x * (1.0 - tanh(tanh_para) * tanh(para)) * mul_right
-    # tanh_para is sqrt(2.0 / pi) * (x + 0.044715 * x * x * x)
-    # mul_right is sqrt(2.0 / pi) * (1 + 3 * 0.044715 * x * x)
+    CSVALUE = 0.044715
+    CSVALUE_SQRT_TWO_DIV_PI = 0.7978845608028564  # np.sqrt(2/np.pi)
+    CSVALUE_TRI = 0.134141  # CSVALUE * 3
 
-    # get op info.
-    input_desc_0 = expand_info['input_desc'][0]
-    input_desc_1 = expand_info['input_desc'][1]
-    input_desc_2 = expand_info['input_desc'][2]
-    graph_builder = builder.GraphBuilder()
+    def _expand(self, graph_builder):
+        # cal formula are:
+        # gelu_grad(dy, x) is dy * y'
+        # y' is 0.5 * (1.0 + tanh(tanh_para)) + 0.5 * x * (1.0 - tanh(tanh_para) * tanh(para)) * mul_right
+        # tanh_para is sqrt(2.0 / pi) * (x + 0.044715 * x * x * x)
+        # mul_right is sqrt(2.0 / pi) * (1 + 3 * 0.044715 * x * x)
 
-    # generate a graph.
-    with graph_builder.graph_scope('main') as graph_scope:
-        # create tensor input.
-        input_dy = graph_builder.tensor(input_desc_0['shape'], input_desc_0['data_type'], input_desc_0['format'])
-        input_x = graph_builder.tensor(input_desc_1['shape'], input_desc_1['data_type'], input_desc_1['format'])
-        input_y = graph_builder.tensor(input_desc_2['shape'], input_desc_2['data_type'], input_desc_2['format'])
-        graph_scope.set_input(input_dy, input_x, input_y)
+        input_dy, input_x, _ = self.inputs
 
         # create some const var
-        const_csvalue = graph_builder.value(input_dy.dtype, CSVALUE)
-        const_csvalue_sqrt_two_div_pi = graph_builder.value(input_dy.dtype, CSVALUE_SQRT_TWO_DIV_PI)
-        const_csvalue_tri = graph_builder.value(input_dy.dtype, CSVALUE_TRI)
-        const_one = graph_builder.value(input_dy.dtype, ONE)
-        const_half = graph_builder.value(input_dy.dtype, HALF)
+        const_csvalue = graph_builder.value(input_dy.dtype, self.CSVALUE)
+        const_csvalue_sqrt_two_div_pi = graph_builder.value(input_dy.dtype, self.CSVALUE_SQRT_TWO_DIV_PI)
+        const_csvalue_tri = graph_builder.value(input_dy.dtype, self.CSVALUE_TRI)
+        const_one = graph_builder.value(input_dy.dtype, 1)
+        const_half = graph_builder.value(input_dy.dtype, 0.5)
 
         # cal mul_right
         mul_double = graph_builder.emit('Mul', [input_x, input_x])
@@ -79,8 +67,4 @@ def expand_gelugrad(expand_info):
         result_tmp = graph_builder.emit('Add', [half_mul_tanh_res_add_one, mul_final])
         result = graph_builder.emit('Mul', [input_dy, result_tmp])
 
-        # set graph output.
-        graph_scope.set_output(result)
-
-    graph = graph_builder.get()[0]
-    return graph
+        return result
diff --git a/mindspore/_extends/graph_kernel/expanders/gkdropout.py b/mindspore/_extends/graph_kernel/expanders/gkdropout.py
index e2da7b5d2b..8101c6c72a 100644
--- a/mindspore/_extends/graph_kernel/expanders/gkdropout.py
+++ b/mindspore/_extends/graph_kernel/expanders/gkdropout.py
@@ -12,35 +12,29 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 # ===========================================================================
-"""generate json desc for GkDropOut"""
-from mindspore._extends.graph_kernel.model import model_builder as builder
+"""generate json desc for GkDropout"""
+from ._utils import Expander, ExpanderInfoValidator as VLD
 
 
-def expand_gkdropout(expand_info):
-    """GkDropOut expander"""
-    # get op info.
-    input_desc = expand_info['input_desc'][0]
-    maks_desc = expand_info['input_desc'][1]
-    keep_prob = expand_info['attr']['keep_prob']
+@VLD.check_all_formats_same
+@VLD.check_attrs('keep_prob')
+class GkDropout(Expander):
+    """GkDropout expander"""
+
+    def _expand(self, graph_builder):
+        input_x, input_mask = self.inputs
+        keep_prob = self.attrs['keep_prob']
 
-    graph_builder = builder.GraphBuilder()
-    with graph_builder.graph_scope('main') as graph_scope:
-        # create tensor input.
-        input_x = graph_builder.tensor(input_desc['shape'], input_desc['data_type'], input_desc['format'])
-        input_mask = graph_builder.tensor(maks_desc['shape'], maks_desc['data_type'], maks_desc['format'])
-        graph_scope.set_input(input_x, input_mask)
-        keep_prob_v = graph_builder.value(input_x.dtype, keep_prob)
         r_keep_prob = graph_builder.value(input_x.dtype, 1.0 / keep_prob)
+        keep_prob = graph_builder.value(input_x.dtype, keep_prob)
 
         if input_mask.dtype != input_x.dtype:
             input_mask = graph_builder.emit('Cast', [input_mask], attrs={'dst_type': input_x.dtype})
-        mask = graph_builder.emit('LessEqual', [input_mask, keep_prob_v])  # output is bool type
+        mask = graph_builder.emit('LessEqual', [input_mask, keep_prob])  # output is bool type
         mask = graph_builder.emit('Cast', [mask], attrs={'dst_type': input_x.dtype})
 
         # compute result
         result = graph_builder.emit('Mul', [r_keep_prob, input_x])
         result = graph_builder.emit('Mul', [result, mask])
-        # set graph output.
-        graph_scope.set_output(result, mask)
-    graph = graph_builder.get()[0]
-    return graph
+
+        return result, mask
diff --git a/mindspore/_extends/graph_kernel/expanders/layernorm.py b/mindspore/_extends/graph_kernel/expanders/layernorm.py
index 79cea1a7d0..17955c293b 100644
--- a/mindspore/_extends/graph_kernel/expanders/layernorm.py
+++ b/mindspore/_extends/graph_kernel/expanders/layernorm.py
@@ -13,38 +13,31 @@
 # limitations under the License.
 # ===========================================================================
 """generate json desc for LayerNorm"""
-from mindspore._extends.graph_kernel.model import model_builder as builder
+from mindspore._extends.graph_kernel.model.model import DataFormat as DF
+from ._utils import Expander, ExpanderInfoValidator as VLD
 
 
-def expand_layernorm(expand_info):
+@VLD.add_format(DF.DEFAULT, DF.DEFAULT, DF.DEFAULT)
+@VLD.check_attrs('begin_norm_axis', 'begin_params_axis', 'epsilon')
+class LayerNorm(Expander):
     """LayerNorm expander"""
-    # get op info.
-    input_desc_0 = expand_info['input_desc'][0]
-    input_desc_1 = expand_info['input_desc'][1]
-    input_desc_2 = expand_info['input_desc'][2]
-    attrs = expand_info['attr']
-    begin_norm_axis = attrs['begin_norm_axis']
-    epsilon = attrs['epsilon']
 
-    graph_builder = builder.GraphBuilder()
-    with graph_builder.graph_scope('main') as graph_scope:
-        # create tensor input.
-        input_x = graph_builder.tensor(input_desc_0['shape'], input_desc_0['data_type'], input_desc_0['format'])
-        input_gamma = graph_builder.tensor(input_desc_1['shape'], input_desc_1['data_type'], input_desc_1['format'])
-        input_beta = graph_builder.tensor(input_desc_2['shape'], input_desc_2['data_type'], input_desc_2['format'])
+    def _expand(self, graph_builder):
+        input_x, input_gamma, input_beta = self.inputs
+        begin_norm_axis = self.attrs['begin_norm_axis']
+        epsilon = self.attrs['epsilon']
 
         # Calculate the scaling ratio of the average
-        shape_x = input_desc_0['shape']
         if begin_norm_axis < 0:
-            begin_norm_axis += len(shape_x)
+            begin_norm_axis += len(input_x.shape)
         reduce_axis = ()
-        for i, _ in enumerate(shape_x):
+        for i, _ in enumerate(input_x.shape):
             if i > begin_norm_axis or i == begin_norm_axis:
                 reduce_axis = reduce_axis + (i,)
 
         reduce_elts = 1.0
         for i in reduce_axis:
-            reduce_elts *= shape_x[i]
+            reduce_elts *= input_x.shape[i]
         mean_cof = 1.0 / reduce_elts
         mean_cof_v = graph_builder.value(input_x.dtype, mean_cof)
 
@@ -70,8 +63,4 @@ def expand_layernorm(expand_info):
         scale_mul = graph_builder.emit('Mul', [input_gamma, normalize_mul])
         res = graph_builder.emit('Add', [scale_mul, input_beta])
 
-        # set graph output.
-        graph_scope.set_output(res, mean, variance)
-
-    graph = graph_builder.get()[0]
-    return graph
+        return res, mean, variance
diff --git a/mindspore/_extends/graph_kernel/expanders/layernorm_grad.py b/mindspore/_extends/graph_kernel/expanders/layernorm_grad.py
index 2a2dbb3f0f..1019ea177e 100644
--- a/mindspore/_extends/graph_kernel/expanders/layernorm_grad.py
+++ b/mindspore/_extends/graph_kernel/expanders/layernorm_grad.py
@@ -13,42 +13,30 @@
 # limitations under the License.
 # ===========================================================================
 """generate json desc for LayerNormGrad"""
-from mindspore._extends.graph_kernel.model import model_builder as builder
+from mindspore._extends.graph_kernel.model.model import DataFormat as DF
+from ._utils import Expander, ExpanderInfoValidator as VLD
 
 
-def expand_layernormgrad(expand_info):
+@VLD.add_format(DF.DEFAULT, DF.DEFAULT, DF.DEFAULT, DF.DEFAULT, DF.DEFAULT)
+@VLD.check_attrs('begin_norm_axis', 'begin_params_axis')
+class LayerNormGrad(Expander):
     """LayerNormGrad expander"""
-    # get op info.
-    x_desc = expand_info['input_desc'][0]
-    dy_desc = expand_info['input_desc'][1]
-    var_desc = expand_info['input_desc'][2]
-    mean_desc = expand_info['input_desc'][3]
-    gamma_desc = expand_info['input_desc'][4]
-    attrs = expand_info['attr']
-    begin_norm_axis = attrs['begin_norm_axis']
-    begin_params_axis = attrs['begin_params_axis']
-    epsilon = attrs['epsilon'] if 'epsilon' in attrs else 1e-11
 
-    shape_x = x_desc['shape']
-    if begin_norm_axis < 0:
-        begin_norm_axis += len(shape_x)
-    if begin_params_axis < 0:
-        begin_params_axis += len(shape_x)
-    norm_axis = tuple(range(begin_norm_axis, len(shape_x)))
-    param_axis = tuple(range(0, begin_params_axis))
-    reduce_size = 1.0
-    for i in norm_axis:
-        reduce_size *= shape_x[i]
+    def _expand(self, graph_builder):
+        x, dy, variance, mean, gamma = self.inputs
+        begin_norm_axis = self.attrs['begin_norm_axis']
+        begin_params_axis = self.attrs['begin_params_axis']
+        epsilon = self.attrs['epsilon'] if 'epsilon' in self.attrs else 1e-11
 
-    graph_builder = builder.GraphBuilder()
-    with graph_builder.graph_scope('main') as graph_scope:
-        # create input tensors.
-        x = graph_builder.tensor(x_desc['shape'], x_desc['data_type'], x_desc['format'])
-        dy = graph_builder.tensor(dy_desc['shape'], dy_desc['data_type'], dy_desc['format'])
-        variance = graph_builder.tensor(var_desc['shape'], var_desc['data_type'], var_desc['format'])
-        mean = graph_builder.tensor(mean_desc['shape'], mean_desc['data_type'], mean_desc['format'])
-        gamma = graph_builder.tensor(gamma_desc['shape'], gamma_desc['data_type'], gamma_desc['format'])
-        graph_scope.set_input(x, dy, variance, mean, gamma)
+        if begin_norm_axis < 0:
+            begin_norm_axis += len(x.shape)
+        if begin_params_axis < 0:
+            begin_params_axis += len(x.shape)
+        norm_axis = tuple(range(begin_norm_axis, len(x.shape)))
+        param_axis = tuple(range(0, begin_params_axis))
+        reduce_size = 1.0
+        for i in norm_axis:
+            reduce_size *= x.shape[i]
 
         # set some constant val.
         eps = graph_builder.value(x.dtype, epsilon)
@@ -99,8 +87,4 @@ def expand_layernormgrad(expand_info):
         dx_tmp = graph_builder.emit('Add', [dx_1, dx_2])
         dx = graph_builder.emit('Add', [dx_tmp, dx_3])
 
-        # set graph output.
-        graph_scope.set_output(dx, dg, db)
-
-    graph = graph_builder.get()[0]
-    return graph
+        return dx, dg, db
diff --git a/mindspore/_extends/graph_kernel/expanders/logsoftmax.py b/mindspore/_extends/graph_kernel/expanders/logsoftmax.py
index 57e57ca463..1765840889 100644
--- a/mindspore/_extends/graph_kernel/expanders/logsoftmax.py
+++ b/mindspore/_extends/graph_kernel/expanders/logsoftmax.py
@@ -13,24 +13,21 @@
 # limitations under the License.
 # ===========================================================================
 """generate json desc for LogSoftmax"""
-from mindspore._extends.graph_kernel.model import model_builder as builder
+from mindspore._extends.graph_kernel.model.model import DataFormat as DF
+from ._utils import Expander, ExpanderInfoValidator as VLD
 
 
-def expand_logsoftmax(expand_info):
+@VLD.add_format(DF.DEFAULT, DF.DEFAULT)
+@VLD.check_attrs('axis')
+class LogSoftmax(Expander):
     """LogSoftmax expander"""
-    # get op info.
-    input_desc = expand_info['input_desc'][0]
-    axis = expand_info['attr']['axis']
-    graph_builder = builder.GraphBuilder()
-    if isinstance(axis, int):
-        axis = (axis,)
-    # generate a graph.
-    with graph_builder.graph_scope('main') as graph_scope:
-        # create tensor input.
-        input_x = graph_builder.tensor(input_desc['shape'], input_desc['data_type'], input_desc['format'])
-        graph_scope.set_input(input_x)
 
-        # cal logsoftmax.
+    def _expand(self, graph_builder):
+        input_x = self.inputs[0]
+        axis = self.attrs['axis']
+        if isinstance(axis, int):
+            axis = (axis,)
+
         max_x = graph_builder.emit('ReduceMax', [input_x], attrs={'reduce_axis': axis, 'keep_dims': True})
         data_sub = graph_builder.emit('Sub', [input_x, max_x])
         data_exp = graph_builder.emit('Exp', [data_sub])
@@ -38,8 +35,4 @@ def expand_logsoftmax(expand_info):
         log_expsum = graph_builder.emit('Log', [data_expsum])
         result = graph_builder.emit('Sub', [data_sub, log_expsum])
 
-        # set graph output.
-        graph_scope.set_output(result)
-
-    graph = graph_builder.get()[0]
-    return graph
+        return result
diff --git a/mindspore/_extends/graph_kernel/expanders/logsoftmax_grad.py b/mindspore/_extends/graph_kernel/expanders/logsoftmax_grad.py
index 350e39c431..9a075d7cc0 100644
--- a/mindspore/_extends/graph_kernel/expanders/logsoftmax_grad.py
+++ b/mindspore/_extends/graph_kernel/expanders/logsoftmax_grad.py
@@ -13,34 +13,24 @@
 # limitations under the License.
 # ===========================================================================
 """generate json desc for LogSoftmaxGrad"""
-from mindspore._extends.graph_kernel.model import model_builder as builder
+from mindspore._extends.graph_kernel.model.model import DataFormat as DF
+from ._utils import Expander, ExpanderInfoValidator as VLD
 
 
-def expand_logsoftmaxgrad(expand_info):
+@VLD.add_format(DF.DEFAULT, DF.DEFAULT)
+@VLD.check_attrs('axis')
+class LogSoftmaxGrad(Expander):
     """LogSoftmaxGrad expander"""
-    # get op info.
-    input_desc_0 = expand_info['input_desc'][0]
-    input_desc_1 = expand_info['input_desc'][1]
-    axis = expand_info['attr']['axis']
-    graph_builder = builder.GraphBuilder()
 
-    if isinstance(axis, int):
-        axis = (axis,)
-    # generate a graph.
-    with graph_builder.graph_scope('main') as graph_scope:
-        # create tensor input.
-        input_logits = graph_builder.tensor(input_desc_0['shape'], input_desc_0['data_type'], input_desc_0['format'])
-        input_dy = graph_builder.tensor(input_desc_1['shape'], input_desc_1['data_type'], input_desc_1['format'])
-        graph_scope.set_input(input_logits, input_dy)
+    def _expand(self, graph_builder):
+        input_logits, input_dy = self.inputs
+        axis = self.attrs['axis']
+        if isinstance(axis, int):
+            axis = (axis,)
 
-        # cal logsoftmaxgrad.
         softmax = graph_builder.emit('Exp', [input_logits])
         dy_sum = graph_builder.emit('ReduceSum', [input_dy], attrs={'reduce_axis': axis, 'keep_dims': True})
         mul_result = graph_builder.emit('Mul', [softmax, dy_sum])
         result = graph_builder.emit('Sub', [input_dy, mul_result])
 
-        # set graph output.
-        graph_scope.set_output(result)
-
-    graph = graph_builder.get()[0]
-    return graph
+        return result
diff --git a/mindspore/_extends/graph_kernel/expanders/maximum_grad.py b/mindspore/_extends/graph_kernel/expanders/maximum_grad.py
index e98c2100e2..8add421f6c 100644
--- a/mindspore/_extends/graph_kernel/expanders/maximum_grad.py
+++ b/mindspore/_extends/graph_kernel/expanders/maximum_grad.py
@@ -13,40 +13,26 @@
 # limitations under the License.
 # ===========================================================================
 """generate json desc for maximum_grad"""
-from mindspore._extends.graph_kernel.model import model_builder as builder
+from mindspore._extends.graph_kernel.model.model import GraphKernelUnsupportedException as GKException
+from ._utils import Expander, ExpanderInfoValidator as VLD
 
 
-def expand_maximumgrad(expand_info):
+@VLD.check_all_formats_same
+class MaximumGrad(Expander):
     """MaximumGrad expander"""
-    # get op info.
-    input_desc_0 = expand_info['input_desc'][0]
-    input_desc_1 = expand_info['input_desc'][1]
-    input_desc_2 = expand_info['input_desc'][2]
-    attrs = expand_info['attr']
-    grad_x = attrs['grad_x'] if 'grad_x' in attrs else True
-    grad_y = attrs['grad_y'] if 'grad_y' in attrs else True
 
-    graph_builder = builder.GraphBuilder()
-    with graph_builder.graph_scope('main') as graph_scope:
-        # create tensor input.
-        input_x = graph_builder.tensor(input_desc_0['shape'], input_desc_0['data_type'], input_desc_0['format'])
-        input_y = graph_builder.tensor(input_desc_1['shape'], input_desc_1['data_type'], input_desc_1['format'])
-        input_dout = graph_builder.tensor(input_desc_2['shape'], input_desc_2['data_type'], input_desc_2['format'])
-        graph_scope.set_input(input_x, input_y, input_dout)
-        x_dtype = input_x.dtype
-        # cal result
+    def _check(self):
+        if not self.attrs.get('grad_x', True) and not self.attrs.get('grad_y', True):
+            raise GKException("both grad_x and grad_y are False.")
+        return super()._check()
+
+    def _expand(self, graph_builder):
+        input_x, input_y, input_dout = self.inputs
+
         ge_result = graph_builder.emit('GreaterEqual', [input_x, input_y])
-        ge_result = graph_builder.emit('Cast', [ge_result], attrs={'dst_type': x_dtype})
+        ge_result = graph_builder.emit('Cast', [ge_result], attrs={'dst_type': input_x.dtype})
         dx = graph_builder.emit('Mul', [ge_result, input_dout])
         dy = graph_builder.emit('Sub', [input_dout, dx])
 
-        # set graph output according to grad_x and grad_y
-        if grad_x and grad_y:
-            graph_scope.set_output(dx, dy)
-        if grad_x and not grad_y:
-            graph_scope.set_output(dx)
-        if grad_y and not grad_x:
-            graph_scope.set_output(dy)
-
-    graph = graph_builder.get()[0]
-    return graph
+        # output two results, regardless of grad_x and grad_y
+        return dx, dy
diff --git a/mindspore/_extends/graph_kernel/expanders/minimum_grad.py b/mindspore/_extends/graph_kernel/expanders/minimum_grad.py
index 8b77aa03c3..7a0006f350 100644
--- a/mindspore/_extends/graph_kernel/expanders/minimum_grad.py
+++ b/mindspore/_extends/graph_kernel/expanders/minimum_grad.py
@@ -13,41 +13,26 @@
 # limitations under the License.
 # ===========================================================================
 """generate json desc for minimum_grad"""
-from mindspore._extends.graph_kernel.model import model_builder as builder
+from mindspore._extends.graph_kernel.model.model import GraphKernelUnsupportedException as GKException
+from ._utils import Expander, ExpanderInfoValidator as VLD
 
 
-def expand_minimumgrad(expand_info):
+@VLD.check_all_formats_same
+class MinimumGrad(Expander):
     """MinimumGrad expander"""
-    # get op info.
-    input_desc_0 = expand_info['input_desc'][0]
-    input_desc_1 = expand_info['input_desc'][1]
-    input_desc_2 = expand_info['input_desc'][2]
-    attrs = expand_info['attr']
-    grad_x = attrs['grad_x'] if 'grad_x' in attrs else True
-    grad_y = attrs['grad_y'] if 'grad_y' in attrs else True
 
-    graph_builder = builder.GraphBuilder()
-    with graph_builder.graph_scope('main') as graph_scope:
-        # create tensor input.
-        input_x = graph_builder.tensor(input_desc_0['shape'], input_desc_0['data_type'], input_desc_0['format'])
-        input_y = graph_builder.tensor(input_desc_1['shape'], input_desc_1['data_type'], input_desc_1['format'])
-        input_dout = graph_builder.tensor(input_desc_2['shape'], input_desc_2['data_type'], input_desc_2['format'])
-        graph_scope.set_input(input_x, input_y, input_dout)
-        x_dtype = input_x.dtype
+    def _check(self):
+        if not self.attrs.get('grad_x', True) and not self.attrs.get('grad_y', True):
+            raise GKException("both grad_x and grad_y are False.")
+        return super()._check()
+
+    def _expand(self, graph_builder):
+        input_x, input_y, input_dout = self.inputs
 
-        # cal result
         le_result = graph_builder.emit('LessEqual', [input_x, input_y])
-        le_result = graph_builder.emit('Cast', [le_result], attrs={'dst_type': x_dtype})
+        le_result = graph_builder.emit('Cast', [le_result], attrs={'dst_type': input_x.dtype})
         dx = graph_builder.emit('Mul', [le_result, input_dout])
         dy = graph_builder.emit('Sub', [input_dout, dx])
 
-        # set graph output according to grad_x and grad_y
-        if grad_x and grad_y:
-            graph_scope.set_output(dx, dy)
-        if grad_x and not grad_y:
-            graph_scope.set_output(dx)
-        if grad_y and not grad_x:
-            graph_scope.set_output(dy)
-
-    graph = graph_builder.get()[0]
-    return graph
+        # output two results, regardless of grad_x and grad_y
+        return dx, dy
diff --git a/mindspore/_extends/graph_kernel/expanders/reduce_mean.py b/mindspore/_extends/graph_kernel/expanders/reduce_mean.py
index 14aa6577df..309080e740 100644
--- a/mindspore/_extends/graph_kernel/expanders/reduce_mean.py
+++ b/mindspore/_extends/graph_kernel/expanders/reduce_mean.py
@@ -13,45 +13,30 @@
 # limitations under the License.
 # ===========================================================================
 """generate json desc for reduce_mean"""
-from mindspore._extends.graph_kernel.model import model_builder as builder
+from mindspore._extends.graph_kernel.model.model import DataFormat as DF
+from ._utils import Expander, ExpanderInfoValidator as VLD
 
 
-def expand_reducemean(expand_info):
+@VLD.add_format(DF.DEFAULT)
+@VLD.check_attrs('axis', 'keep_dims')
+class ReduceMean(Expander):
     """ReduceMean expander"""
-    # get op info.
-    input_desc = expand_info['input_desc'][0]
-    attrs = expand_info['attr']
-    axis = attrs['axis']
-    keep_dims = attrs['keep_dims']
 
-    graph_builder = builder.GraphBuilder()
-    with graph_builder.graph_scope('main') as graph_scope:
-        # create tensor input.
-        input_x = graph_builder.tensor(input_desc['shape'], input_desc['data_type'], input_desc['format'])
-        x_shape = input_x.shape
-        graph_scope.set_input(input_x)
+    def _expand(self, graph_builder):
+        x = self.inputs[0]
+        axis = self.attrs['axis']
+        keep_dims = self.attrs['keep_dims']
 
-        # cal reduce_mean, when axis = None, reduce axis are all
-        all_shape = 1.0
-        real_axis = []
+        # cal reduce_mean, when axis is None, reduce all axes.
         if not axis:
-            for i, shape in enumerate(x_shape):
-                real_axis.append(i)
-                all_shape *= shape
-        else:
-            for idx in axis:
-                all_shape *= x_shape[idx]
+            axis = list(range(len(x.shape)))
+        reduce_size = 1.0
+        for idx in axis:
+            reduce_size *= x.shape[idx]
 
-        all_shape_value = graph_builder.value(input_x.dtype, all_shape)
+        reduce_size_value = graph_builder.value(x.dtype, reduce_size)
 
-        if not axis:
-            sum_x = graph_builder.emit('ReduceSum', [input_x], attrs={'reduce_axis': real_axis, 'keep_dims': keep_dims})
-        else:
-            sum_x = graph_builder.emit('ReduceSum', [input_x], attrs={'reduce_axis': axis, 'keep_dims': keep_dims})
-        result = graph_builder.emit('RealDiv', [sum_x, all_shape_value])
-
-        # set graph output.
-        graph_scope.set_output(result)
+        sum_x = graph_builder.emit('ReduceSum', [x], attrs={'reduce_axis': axis, 'keep_dims': keep_dims})
+        result = graph_builder.emit('RealDiv', [sum_x, reduce_size_value])
 
-    graph = graph_builder.get()[0]
-    return graph
+        return result
diff --git a/mindspore/_extends/graph_kernel/expanders/softmax.py b/mindspore/_extends/graph_kernel/expanders/softmax.py
index 3696ff8c02..8420052364 100644
--- a/mindspore/_extends/graph_kernel/expanders/softmax.py
+++ b/mindspore/_extends/graph_kernel/expanders/softmax.py
@@ -13,26 +13,23 @@
 # limitations under the License.
 # ===========================================================================
 """generate json desc for softmax"""
-from mindspore._extends.graph_kernel.model import model_builder as builder
+from mindspore._extends.graph_kernel.model.model import DataFormat as DF
+from ._utils import Expander, ExpanderInfoValidator as VLD
 
 
-def expand_softmax(expand_info):
+@VLD.add_format(DF.DEFAULT)
+@VLD.check_attrs('axis')
+class Softmax(Expander):
     """Softmax expander"""
-    input_desc = expand_info['input_desc'][0]
-    axis = expand_info['attr']['axis']
 
-    graph_builder = builder.GraphBuilder()
-    with graph_builder.graph_scope('main') as graph_scope:
-        # create tensor input.
-        input_x = graph_builder.tensor(input_desc['shape'], input_desc['data_type'], input_desc['format'])
-        # cal softmax.
+    def _expand(self, graph_builder):
+        input_x = self.inputs[0]
+        axis = self.attrs['axis']
+
         max_x = graph_builder.emit('ReduceMax', [input_x], attrs={'reduce_axis': axis, 'keep_dims': True})
         data_sub = graph_builder.emit('Sub', [input_x, max_x])
         data_exp = graph_builder.emit('Exp', [data_sub])
         data_expsum = graph_builder.emit('ReduceSum', [data_exp], attrs={'reduce_axis': axis, 'keep_dims': True})
         result = graph_builder.emit('RealDiv', [data_exp, data_expsum])
-        # set graph output.
-        graph_scope.set_output(result)
 
-    graph = graph_builder.get()[0]
-    return graph
+        return result
diff --git a/mindspore/_extends/graph_kernel/expanders/sqrt_grad.py b/mindspore/_extends/graph_kernel/expanders/sqrt_grad.py
index d2ec123fdc..aaea624114 100644
--- a/mindspore/_extends/graph_kernel/expanders/sqrt_grad.py
+++ b/mindspore/_extends/graph_kernel/expanders/sqrt_grad.py
@@ -13,33 +13,17 @@
 # limitations under the License.
 # ===========================================================================
 """generate json desc for sqrtgrad"""
-from mindspore._extends.graph_kernel.model import model_builder as builder
+from ._utils import Expander, ExpanderInfoValidator as VLD
 
 
-def expand_sqrtgrad(expand_info):
+@VLD.check_all_formats_same
+class SqrtGrad(Expander):
     """SqrtGrad expander"""
-    # cal formula are:
-    # sqrt_grad(x, dout) is dout / (2 * x)
 
-    # get op info.
-    input_desc_0 = expand_info['input_desc'][0]
-    input_desc_1 = expand_info['input_desc'][1]
-    graph_builder = builder.GraphBuilder()
-
-    # generate a graph.
-    with graph_builder.graph_scope('main') as graph_scope:
-        # create tensor input.
-        input_x = graph_builder.tensor(input_desc_0['shape'], input_desc_0['data_type'], input_desc_0['format'])
-        input_dout = graph_builder.tensor(input_desc_1['shape'], input_desc_1['data_type'], input_desc_1['format'])
-        graph_scope.set_input(input_x, input_dout)
-
-        # cal result
-        const_two = graph_builder.value(input_x.dtype, 2)
-        dividend = graph_builder.emit('Mul', [input_x, const_two])
-        result = graph_builder.emit('RealDiv', [input_dout, dividend])
-
-        # set graph output.
-        graph_scope.set_output(result)
-
-    graph = graph_builder.get()[0]
-    return graph
+    def _expand(self, graph_builder):
+        # sqrt_grad(x, dout) = dout / (2 * x)
+        x, dout = self.inputs
+        const_two = graph_builder.value(x.dtype, 2)
+        dividend = graph_builder.emit('Mul', [x, const_two])
+        result = graph_builder.emit('RealDiv', [dout, dividend])
+        return result
diff --git a/mindspore/_extends/graph_kernel/expanders/square.py b/mindspore/_extends/graph_kernel/expanders/square.py
index daade226b7..2d34c96699 100644
--- a/mindspore/_extends/graph_kernel/expanders/square.py
+++ b/mindspore/_extends/graph_kernel/expanders/square.py
@@ -1,4 +1,4 @@
-# Copyright 2020 Huawei Technologies Co., Ltd
+# Copyright 2020-2021 Huawei Technologies Co., Ltd
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -13,24 +13,13 @@
 # limitations under the License.
 # ===========================================================================
 """generate json desc for square"""
-from mindspore._extends.graph_kernel.model import model_builder as builder
+from ._utils import Expander
 
 
-def expand_square(expand_info):
+class Square(Expander):
     """Square expander"""
 
-    # get op info.
-    input_desc = expand_info['input_desc'][0]
-    graph_builder = builder.GraphBuilder()
-
-    # generate a graph.
-    with graph_builder.graph_scope('main') as graph_scope:
-        # create tensor input.
-        input_x = graph_builder.tensor(input_desc['shape'], input_desc['data_type'], input_desc['format'])
-        # create op.
-        result = graph_builder.emit('Mul', [input_x, input_x])
-        # set graph output.
-        graph_scope.set_output(result)
-
-    graph = graph_builder.get()[0]
-    return graph
+    def _expand(self, graph_builder):
+        x = self.inputs[0]
+        result = graph_builder.emit('Mul', [x, x])
+        return result
diff --git a/mindspore/_extends/graph_kernel/expanders/tanh_grad.py b/mindspore/_extends/graph_kernel/expanders/tanh_grad.py
index 4e6fc8c326..a43c79625b 100644
--- a/mindspore/_extends/graph_kernel/expanders/tanh_grad.py
+++ b/mindspore/_extends/graph_kernel/expanders/tanh_grad.py
@@ -13,34 +13,19 @@
 # limitations under the License.
 # ===========================================================================
 """generate json desc for tanh_grad"""
-from mindspore._extends.graph_kernel.model import model_builder as builder
+from ._utils import Expander, ExpanderInfoValidator as VLD
 
-ONE = 1.0
 
-
-def expand_tanhgrad(expand_info):
+@VLD.check_all_formats_same
+class TanhGrad(Expander):
     """TanhGrad expander"""
 
-    # get op info.
-    input_desc_0 = expand_info['input_desc'][0]
-    input_desc_1 = expand_info['input_desc'][1]
-    graph_builder = builder.GraphBuilder()
-
-    # generate a graph.
-    with graph_builder.graph_scope('main') as graph_scope:
-        # create tensor input.
-        input_y = graph_builder.tensor(input_desc_0['shape'], input_desc_0['data_type'], input_desc_0['format'])
-        input_dy = graph_builder.tensor(input_desc_1['shape'], input_desc_1['data_type'], input_desc_1['format'])
-        const_one = graph_builder.value(input_y.dtype, ONE)
-        graph_scope.set_input(input_y, input_dy)
+    def _expand(self, graph_builder):
+        input_y, input_dy = self.inputs
 
-        # cal result
+        const_one = graph_builder.value(input_y.dtype, 1)
         double_y = graph_builder.emit('Mul', [input_y, input_y])
         one_sub_double_y = graph_builder.emit('Sub', [const_one, double_y])
         result = graph_builder.emit('Mul', [input_dy, one_sub_double_y])
 
-        # set graph output.
-        graph_scope.set_output(result)
-
-    graph = graph_builder.get()[0]
-    return graph
+        return result
diff --git a/mindspore/_extends/graph_kernel/expanders/tile.py b/mindspore/_extends/graph_kernel/expanders/tile.py
index 3587bfd7f3..45e881f550 100644
--- a/mindspore/_extends/graph_kernel/expanders/tile.py
+++ b/mindspore/_extends/graph_kernel/expanders/tile.py
@@ -14,25 +14,22 @@
 # ===========================================================================
 """generate json desc for Tile"""
 from mindspore._extends.graph_kernel.model import model_builder as builder
+from mindspore._extends.graph_kernel.model.model import DataFormat as DF
+from ._utils import Expander, ExpanderInfoValidator as VLD
 
 
-def expand_tile(expand_info):
+@VLD.add_format(DF.DEFAULT)
+@VLD.check_attrs('multiples')
+class Tile(Expander):
     """Tile expander"""
-    input_desc = expand_info['input_desc'][0]
-    multiples = expand_info['attr']['multiples']
-    output_shape, _, _, shape_compatible = builder.get_tile_output_shape(input_desc['shape'], multiples)
 
-    graph_builder = builder.GraphBuilder()
-    with graph_builder.graph_scope('main') as graph_scope:
-        # create tensor input.
-        input_x = graph_builder.tensor(input_desc['shape'], input_desc['data_type'], input_desc['format'])
-        # create op.
+    def _expand(self, graph_builder):
+        input_x = self.inputs[0]
+        multiples = self.attrs['multiples']
+
+        output_shape, _, _, shape_compatible = builder.get_tile_output_shape(self.inputs[0].shape, multiples)
         if shape_compatible:
             result = graph_builder.emit('BroadcastTo', [input_x], attrs={'shape': output_shape})
         else:
             result = graph_builder.emit('Tile', [input_x], attrs={'multiples': multiples})
-        # set graph output.
-        graph_scope.set_output(result)
-
-    graph = graph_builder.get()[0]
-    return graph
+        return result
diff --git a/mindspore/_extends/graph_kernel/model/model.py b/mindspore/_extends/graph_kernel/model/model.py
index 7aeb669de1..8831562d48 100644
--- a/mindspore/_extends/graph_kernel/model/model.py
+++ b/mindspore/_extends/graph_kernel/model/model.py
@@ -55,6 +55,25 @@ class DataFormat:
     NDHWC = "NDHWC"
 
 
+class DataType:
+    """Data Type"""
+    FLOAT = "float"
+    FLOAT16 = "float16"
+    FLOAT32 = "float32"
+    FLOAT64 = "float64"
+    INT = "int"
+    INT8 = "int8"
+    INT16 = "int16"
+    INT32 = "int32"
+    INT64 = "int64"
+    UINT = "uint"
+    UINT8 = "uint8"
+    UINT16 = "uint16"
+    UINT32 = "uint32"
+    UINT64 = "uint64"
+    BOOL = "bool"
+
+
 class Config:
     R0 = 8.0
     UB_SIZE = 256 * 1024
@@ -508,3 +527,9 @@ class AddControlBuddy(GraphVisitor):
         for owner in self.buddies:
             for op in self.buddies[owner]:
                 owner.add_buddy(op.output)
+
+
+class GraphKernelUnsupportedException(Exception):
+    def __init__(self, message):
+        super().__init__()
+        self.message = message
diff --git a/mindspore/ccsrc/backend/optimizer/graph_kernel/graph_kernel_expander.cc b/mindspore/ccsrc/backend/optimizer/graph_kernel/graph_kernel_expander.cc
index eb50aa8884..90800ffd35 100644
--- a/mindspore/ccsrc/backend/optimizer/graph_kernel/graph_kernel_expander.cc
+++ b/mindspore/ccsrc/backend/optimizer/graph_kernel/graph_kernel_expander.cc
@@ -90,7 +90,7 @@ FuncGraphPtr GraphKernelExpander::CreateExpandFuncGraph(const CNodePtr &node) {
   }
   std::string kernel_desc_str = py::cast<std::string>(ret);
   if (kernel_desc_str.empty()) {
-    MS_LOG(ERROR) << "Jump expand node: " << node->fullname_with_scope();
+    MS_LOG(INFO) << "Jump expand node: " << node->fullname_with_scope();
     return nullptr;
   }
   // decode json to func_graph.
@@ -131,11 +131,8 @@ AnfNodePtr GraphKernelExpander::CreateExpandGraphKernel(const FuncGraphPtr &func
   kernel::GetFuncGraphOutputNodes(new_func_graph, &outputs);
   auto graph_kernel_node = CreateNewFuseCNode(func_graph, new_func_graph, inputs, outputs);
   SetNewKernelInfo(graph_kernel_node, new_func_graph, inputs, outputs, AnfAlgo::GetProcessor(node));
-  std::string graph_kernel_flag;
-  std::for_each(kernel_nodes.begin(), kernel_nodes.end(), [&graph_kernel_flag](const AnfNodePtr &node) {
-    static_cast<void>(graph_kernel_flag.append(AnfAlgo::GetCNodeName(node)).append("_"));
-  });
-  MS_LOG(DEBUG) << "Expand node: " << node->fullname_with_scope() << " with: " << graph_kernel_flag;
+  MS_LOG(DEBUG) << "Expand node: " << node->fullname_with_scope()
+                << " with: " << graph_kernel_node->fullname_with_scope();
   return graph_kernel_node;
 }
 
@@ -152,14 +149,12 @@ bool GraphKernelExpander::DoExpand(const FuncGraphPtr &func_graph) {
       continue;
     }
 
-    MS_LOG(INFO) << "Expand process node: " << node->fullname_with_scope();
+    MS_LOG(INFO) << "Expanding node: " << node->fullname_with_scope();
     auto new_func_graph = CreateExpandFuncGraph(node);
     if (new_func_graph == nullptr) {
-      MS_LOG(ERROR) << "Decode fused nodes failed, " << node->fullname_with_scope();
       continue;
     }
     mng->AddFuncGraph(new_func_graph);
-    MS_LOG(DEBUG) << "decode fused nodes success.";
 
     auto graph_kernel_node = CreateExpandGraphKernel(func_graph, new_func_graph, node);
     new_func_graph->set_attr(FUNC_GRAPH_ATTR_GRAPH_KERNEL, MakeValue(AnfAlgo::GetCNodeName(node)));