diff --git a/mindinsight/mindconverter/common/exceptions.py b/mindinsight/mindconverter/common/exceptions.py
index 92ac6101..a33e2d1c 100644
--- a/mindinsight/mindconverter/common/exceptions.py
+++ b/mindinsight/mindconverter/common/exceptions.py
@@ -1,4 +1,4 @@
-# Copyright 2019 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.
@@ -301,6 +301,8 @@ class SourceFilesSaveError(MindConverterException):
         NODE_INPUT_TYPE_NOT_SUPPORT = 1
         SCRIPT_GENERATE_FAIL = 2
         REPORT_GENERATE_FAIL = 3
+        CKPT_GENERATE_FAIL = 4
+        MAP_GENERATE_FAIL = 5
 
     BASE_ERROR_CODE = ConverterErrors.SOURCE_FILES_SAVE_FAIL.value
     ERROR_CODE = ErrCode.UNKNOWN_ERROR.value
@@ -315,6 +317,8 @@ class SourceFilesSaveError(MindConverterException):
         except_source = (NodeInputTypeNotSupportError,
                          ScriptGenerationError,
                          ReportGenerationError,
+                         CheckPointGenerationError,
+                         WeightMapGenerationError,
                          IOError, cls)
         return except_source
 
@@ -437,6 +441,32 @@ class ReportGenerationError(SourceFilesSaveError):
         return ZeroDivisionError, cls
 
 
+class CheckPointGenerationError(SourceFilesSaveError):
+    """The checkpoint generate fail error."""
+    ERROR_CODE = SourceFilesSaveError.ErrCode.CKPT_GENERATE_FAIL.value
+
+    def __init__(self, msg):
+        super(CheckPointGenerationError, self).__init__(msg=msg)
+
+    @classmethod
+    def raise_from(cls):
+        """Raise from exceptions below."""
+        return cls
+
+
+class WeightMapGenerationError(SourceFilesSaveError):
+    """The weight names map generate fail error."""
+    ERROR_CODE = SourceFilesSaveError.ErrCode.MAP_GENERATE_FAIL.value
+
+    def __init__(self, msg):
+        super(WeightMapGenerationError, self).__init__(msg=msg)
+
+    @classmethod
+    def raise_from(cls):
+        """Raise from exception below."""
+        return cls
+
+
 class SubGraphSearchingError(MindConverterException):
     """Sub-graph searching exception."""
 
diff --git a/mindinsight/mindconverter/graph_based_converter/__init__.py b/mindinsight/mindconverter/graph_based_converter/__init__.py
index 888b034f..c25f490f 100644
--- a/mindinsight/mindconverter/graph_based_converter/__init__.py
+++ b/mindinsight/mindconverter/graph_based_converter/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2020 Huawei Technologies Co., Ltd.All Rights Reserved.
+# Copyright 2020-2021 Huawei Technologies Co., Ltd.All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -15,5 +15,5 @@
 """Graph based scripts converter definition."""
 __all__ = ["graph_based_converter_pytorch_to_ms", "graph_based_converter_tf_to_ms"]
 
-from .framework import graph_based_converter_pytorch_to_ms
-from .framework import graph_based_converter_tf_to_ms
+from mindinsight.mindconverter.graph_based_converter.framework import graph_based_converter_pytorch_to_ms
+from mindinsight.mindconverter.graph_based_converter.framework import graph_based_converter_tf_to_ms
diff --git a/mindinsight/mindconverter/graph_based_converter/common/code_fragment.py b/mindinsight/mindconverter/graph_based_converter/common/code_fragment.py
index 108d543e..9d2fbd0c 100644
--- a/mindinsight/mindconverter/graph_based_converter/common/code_fragment.py
+++ b/mindinsight/mindconverter/graph_based_converter/common/code_fragment.py
@@ -191,18 +191,23 @@ class CodeFragment(Fragment):
     """
 
     def __init__(self, operation, actual_args, settings, input_shape, output_shape,
-                 trainable_params=None):
+                 trainable_params=None, trainable_weights=None):
         super(CodeFragment, self).__init__(operation=operation, actual_args=actual_args,
                                            input_shape=input_shape, output_shape=output_shape,
                                            settings=settings)
         self._trainable_params = dict()  # External weights, like Matmul.
         self._init_trainable_params = trainable_params  # Can put into operation init method, like Conv2d.
+        self._trainable_weights = trainable_weights
 
     @property
     def trainable_params(self):
         """Return the trainable parameters."""
         return self._trainable_params
 
+    @property
+    def trainable_weights(self):
+        return self._trainable_weights
+
 
 class ModuleFragment(Fragment):
     """Manage module type code variables."""
diff --git a/mindinsight/mindconverter/graph_based_converter/common/global_context.py b/mindinsight/mindconverter/graph_based_converter/common/global_context.py
index 0ab74cf4..212c72d5 100644
--- a/mindinsight/mindconverter/graph_based_converter/common/global_context.py
+++ b/mindinsight/mindconverter/graph_based_converter/common/global_context.py
@@ -14,7 +14,7 @@
 # ==============================================================================
 """Define GlobalContext class to save required resources during whole conversion procedure."""
 from collections import OrderedDict
-from .outputs import OutputStorage
+from mindinsight.mindconverter.graph_based_converter.common.outputs import OutputStorage
 
 
 class Singleton(type):
diff --git a/mindinsight/mindconverter/graph_based_converter/common/utils.py b/mindinsight/mindconverter/graph_based_converter/common/utils.py
index 1a4d7a6a..49665b6b 100644
--- a/mindinsight/mindconverter/graph_based_converter/common/utils.py
+++ b/mindinsight/mindconverter/graph_based_converter/common/utils.py
@@ -13,16 +13,21 @@
 # limitations under the License.
 # ============================================================================
 """Define common utils."""
+import json
 import os
 import stat
 from importlib import import_module
+from importlib.util import find_spec
 from typing import List, Tuple, Mapping
 
-from mindinsight.mindconverter.common.exceptions import ScriptGenerationError, ReportGenerationError, UnknownModelError
+from mindinsight.mindconverter.common.exceptions import ScriptGenerationError, ReportGenerationError, \
+    UnknownModelError, CheckPointGenerationError, WeightMapGenerationError
 from mindinsight.mindconverter.common.log import logger as log
 from mindinsight.mindconverter.graph_based_converter.constant import SEPARATOR_IN_ONNX_OP, BINARY_HEADER_PYTORCH_BITS, \
     FrameworkType, BINARY_HEADER_PYTORCH_FILE, TENSORFLOW_MODEL_SUFFIX
 
+from mindspore.train.serialization import save_checkpoint
+
 
 def is_converted(operation: str):
     """
@@ -96,7 +101,6 @@ def save_code_file_and_report(model_name: str, code_lines: Mapping[str, Tuple],
         code_lines (dict): Code lines.
         out_folder (str): Output folder.
         report_folder (str): Report output folder.
-
     """
     flags = os.O_WRONLY | os.O_CREAT | os.O_EXCL
     modes = stat.S_IRUSR | stat.S_IWUSR
@@ -114,7 +118,7 @@ def save_code_file_and_report(model_name: str, code_lines: Mapping[str, Tuple],
         os.makedirs(report_folder, modes_usr)
 
     for file_name in code_lines:
-        code, report = code_lines[file_name]
+        code, report, trainable_weights, weight_map = code_lines[file_name]
         code_file_path = os.path.realpath(os.path.join(out_folder, f"{model_name}.py"))
         report_file_path = os.path.realpath(os.path.join(report_folder, f"report_of_{model_name}.txt"))
         try:
@@ -133,6 +137,31 @@ def save_code_file_and_report(model_name: str, code_lines: Mapping[str, Tuple],
         except (IOError, FileExistsError) as error:
             raise ReportGenerationError(str(error))
 
+        ckpt_file_path = os.path.realpath(os.path.join(out_folder, f"{model_name}.ckpt"))
+        try:
+            if os.path.exists(ckpt_file_path):
+                raise CheckPointGenerationError("Checkpoint file with the same name already exists.")
+            save_checkpoint(trainable_weights, ckpt_file_path)
+        except TypeError as error:
+            raise CheckPointGenerationError(str(error))
+
+        weight_map_path = os.path.realpath(os.path.join(out_folder, f"weight_map_of_{model_name}.json"))
+        try:
+            if os.path.exists(weight_map_path):
+                raise WeightMapGenerationError("Weight map file with the same name already exists.")
+            with os.fdopen(os.open(weight_map_path, flags, stat.S_IRUSR), 'w') as map_f:
+                weight_map_json = {f"{model_name}": weight_map}
+                json.dump(weight_map_json, map_f)
+        except (IOError, FileExistsError) as error:
+            raise WeightMapGenerationError(str(error))
+
+
+def onnx_satisfied():
+    """Validate ONNX , ONNXRUNTIME, ONNXOPTIMIZER installation."""
+    if not find_spec("onnx") or not find_spec("onnxruntime") or not find_spec("onnxoptimizer"):
+        return False
+    return True
+
 
 def lib_version_satisfied(current_ver: str, mini_ver_limited: str,
                           newest_ver_limited: str = ""):
@@ -220,6 +249,7 @@ def reset_init_or_construct(template, variable_slot, new_data, scope):
     template[variable_slot][scope] += new_data
     return template
 
+
 def replace_string_in_list(str_list: list, original_str: str, target_str: str):
     """
     Replace a string in a list by provided string.
diff --git a/mindinsight/mindconverter/graph_based_converter/constant.py b/mindinsight/mindconverter/graph_based_converter/constant.py
index 7f138b2e..330ef767 100644
--- a/mindinsight/mindconverter/graph_based_converter/constant.py
+++ b/mindinsight/mindconverter/graph_based_converter/constant.py
@@ -41,6 +41,7 @@ UNKNOWN_DIM_VAL = "unk__001"
 ONNX_MIN_VER = "1.8.0"
 TF2ONNX_MIN_VER = "1.7.1"
 ONNXRUNTIME_MIN_VER = "1.5.2"
+ONNXOPTIMIZER_MIN_VER = "0.1.2"
 
 
 @unique
diff --git a/mindinsight/mindconverter/graph_based_converter/framework.py b/mindinsight/mindconverter/graph_based_converter/framework.py
index aaeb0d99..804fdd35 100644
--- a/mindinsight/mindconverter/graph_based_converter/framework.py
+++ b/mindinsight/mindconverter/graph_based_converter/framework.py
@@ -21,10 +21,10 @@ from importlib.util import find_spec
 
 import mindinsight
 from mindinsight.mindconverter.graph_based_converter.common.global_context import GlobalContext
-from mindinsight.mindconverter.graph_based_converter.common.utils import lib_version_satisfied, \
+from mindinsight.mindconverter.graph_based_converter.common.utils import lib_version_satisfied, onnx_satisfied, \
     save_code_file_and_report, get_framework_type
 from mindinsight.mindconverter.graph_based_converter.constant import FrameworkType, \
-    ONNX_MIN_VER, TF2ONNX_MIN_VER, ONNXRUNTIME_MIN_VER
+    ONNX_MIN_VER, TF2ONNX_MIN_VER, ONNXRUNTIME_MIN_VER, ONNXOPTIMIZER_MIN_VER
 from mindinsight.mindconverter.graph_based_converter.generator import batch_add_nodes
 from mindinsight.mindconverter.graph_based_converter.mapper import ONNXToMindSporeMapper
 from mindinsight.mindconverter.common.log import logger as log, logger_console as log_console
@@ -53,6 +53,18 @@ parser.add_argument("--report", type=str, required=False,
                     help="Generated reports output folder path.")
 
 
+def onnx_lib_version_satisfied():
+    """Check onnx libs version whether is satisfied."""
+    onnx = import_module("onnx")
+    ort = import_module("onnxruntime")
+    optimizer = import_module("onnxoptimizer.version")
+    if not lib_version_satisfied(getattr(onnx, "__version__"), ONNX_MIN_VER) \
+            or not lib_version_satisfied(getattr(ort, "__version__"), ONNXRUNTIME_MIN_VER) \
+            or not lib_version_satisfied(getattr(optimizer, "version"), ONNXOPTIMIZER_MIN_VER):
+        return False
+    return True
+
+
 def torch_installation_validation(func):
     """
     Validate args of func.
@@ -68,26 +80,33 @@ def torch_installation_validation(func):
            input_nodes: str, output_nodes: str,
            output_folder: str, report_folder: str = None):
         # Check whether pytorch is installed.
-        if not find_spec("torch") or not find_spec("onnx") or not find_spec("onnxruntime"):
-            error = RuntimeIntegrityError(f"PyTorch, onnx(>={ONNX_MIN_VER}) and "
-                                          f"onnxruntime(>={ONNXRUNTIME_MIN_VER}) "
-                                          f"are required when using graph based "
-                                          f"scripts converter, and PyTorch version must "
-                                          f"be consisted with model generation runtime.")
+        error_info = None
+        if graph_path.endswith('.onnx'):
+            if not onnx_satisfied():
+                error_info = f"onnx(>={ONNX_MIN_VER}, onnxruntime(>={ONNXRUNTIME_MIN_VER}) and " \
+                             f"onnxoptimizer(>={ONNXOPTIMIZER_MIN_VER}) " \
+                             f"are required when using graph based scripts converter."
+        else:
+            if not find_spec("torch") or not onnx_satisfied():
+                error_info = f"PyTorch, onnx(>={ONNX_MIN_VER}), " \
+                             f"onnxruntime(>={ONNXRUNTIME_MIN_VER}) and " \
+                             f"onnxoptimizer(>={ONNXOPTIMIZER_MIN_VER}) " \
+                             f"are required when using graph based " \
+                             f"scripts converter, and PyTorch version must " \
+                             f"be consisted with model generation runtime."
+        if error_info:
+            error = RuntimeIntegrityError(error_info)
             log.error(error)
             log_console.error("\n")
             log_console.error(str(error))
             log_console.error("\n")
             sys.exit(0)
 
-        onnx = import_module("onnx")
-        ort = import_module("onnxruntime")
-
-        if not lib_version_satisfied(getattr(onnx, "__version__"), ONNX_MIN_VER) \
-                or not lib_version_satisfied(getattr(ort, "__version__"), ONNXRUNTIME_MIN_VER):
+        if not onnx_lib_version_satisfied():
             error = RuntimeIntegrityError(
-                f"onnx(>={ONNX_MIN_VER}) and "
-                f"onnxruntime(>={ONNXRUNTIME_MIN_VER}) are required when using graph "
+                f"onnx(>={ONNX_MIN_VER}), "
+                f"onnxruntime(>={ONNXRUNTIME_MIN_VER}) and "
+                f"onnxoptimizer(>={ONNXOPTIMIZER_MIN_VER}) are required when using graph "
                 f"based scripts converter for Pytorch conversion."
             )
             log.error(error)
@@ -128,11 +147,11 @@ def tf_installation_validation(func):
            output_folder: str, report_folder: str = None,
            input_nodes: str = None, output_nodes: str = None):
         # Check whether tensorflow is installed.
-        if not _check_tf_installation() or not find_spec("tf2onnx") \
-                or not find_spec("onnx") or not find_spec("onnxruntime"):
+        if not _check_tf_installation() or not onnx_satisfied():
             error = RuntimeIntegrityError(
-                f"TensorFlow, tf2onnx(>={TF2ONNX_MIN_VER}), onnx(>={ONNX_MIN_VER}) and "
-                f"onnxruntime(>={ONNXRUNTIME_MIN_VER}) are required when using graph "
+                f"TensorFlow, tf2onnx(>={TF2ONNX_MIN_VER}), onnx(>={ONNX_MIN_VER}), "
+                f"onnxruntime(>={ONNXRUNTIME_MIN_VER}) and onnxoptimizer(>={ONNXOPTIMIZER_MIN_VER}) "
+                f"are required when using graph "
                 f"based scripts converter for TensorFlow conversion."
             )
             log.error(error)
@@ -141,15 +160,14 @@ def tf_installation_validation(func):
             log_console.error("\n")
             sys.exit(0)
 
-        onnx, tf2onnx = import_module("onnx"), import_module("tf2onnx")
-        ort = import_module("onnxruntime")
+        tf2onnx = import_module("tf2onnx")
 
-        if not lib_version_satisfied(getattr(onnx, "__version__"), ONNX_MIN_VER) \
-                or not lib_version_satisfied(getattr(ort, "__version__"), ONNXRUNTIME_MIN_VER) \
-                or not lib_version_satisfied(getattr(tf2onnx, "__version__"), TF2ONNX_MIN_VER):
+        if not lib_version_satisfied(getattr(tf2onnx, "__version__"), TF2ONNX_MIN_VER) \
+                or not onnx_lib_version_satisfied():
             error = RuntimeIntegrityError(
-                f"TensorFlow, tf2onnx(>={TF2ONNX_MIN_VER}), onnx(>={ONNX_MIN_VER}) and "
-                f"onnxruntime(>={ONNXRUNTIME_MIN_VER}) are required when using graph "
+                f"TensorFlow, tf2onnx(>={TF2ONNX_MIN_VER}), onnx(>={ONNX_MIN_VER}), "
+                f"onnxruntime(>={ONNXRUNTIME_MIN_VER}) and onnxoptimizer(>={ONNXOPTIMIZER_MIN_VER}) "
+                f"are required when using graph "
                 f"based scripts converter for TensorFlow conversion."
             )
             log.error(error)
@@ -258,12 +276,12 @@ def main_graph_base_converter(file_config):
         raise ParamMissingError("Param missing, `--shape` is required when using graph mode.")
 
     if frame_type == FrameworkType.PYTORCH.value:
-        check_params = ['input_nodes', 'output_nodes']
-        check_params_exist(check_params, file_config)
         graph_based_converter_pytorch_to_ms(graph_path=graph_path,
                                             sample_shape=file_config['shape'],
-                                            input_nodes=file_config['input_nodes'],
-                                            output_nodes=file_config['output_nodes'],
+                                            input_nodes=file_config['input_nodes'] if file_config['input_nodes']
+                                            else 'input.1',
+                                            output_nodes=file_config['output_nodes'] if file_config['output_nodes']
+                                            else '',
                                             output_folder=file_config['outfile_dir'],
                                             report_folder=file_config['report_dir'])
     elif frame_type == FrameworkType.TENSORFLOW.value:
diff --git a/mindinsight/mindconverter/graph_based_converter/generator/__init__.py b/mindinsight/mindconverter/graph_based_converter/generator/__init__.py
index dafdfc96..849b4f3e 100644
--- a/mindinsight/mindconverter/graph_based_converter/generator/__init__.py
+++ b/mindinsight/mindconverter/graph_based_converter/generator/__init__.py
@@ -18,10 +18,10 @@ __all__ = ["batch_add_nodes"]
 import re
 import copy
 
-from .generator import Generator, CodeStruct
-from ..common.code_fragment import CodeFragment, NewFragment
-from ..common.outputs import NodeOutputManager
-from ..constant import ExchangeMessageKeywords
+from mindinsight.mindconverter.graph_based_converter.generator.generator import Generator, CodeStruct
+from mindinsight.mindconverter.graph_based_converter.common.code_fragment import NewFragment
+from mindinsight.mindconverter.graph_based_converter.common.outputs import NodeOutputManager
+from mindinsight.mindconverter.graph_based_converter.constant import ExchangeMessageKeywords
 
 
 def _tf_model_node_name_reformat(node, node_name):
diff --git a/mindinsight/mindconverter/graph_based_converter/generator/generator.py b/mindinsight/mindconverter/graph_based_converter/generator/generator.py
index 6bdb7bb2..154f6860 100644
--- a/mindinsight/mindconverter/graph_based_converter/generator/generator.py
+++ b/mindinsight/mindconverter/graph_based_converter/generator/generator.py
@@ -16,6 +16,7 @@
 import copy
 from collections import OrderedDict
 
+from mindspore import Tensor
 from yapf.yapflib.yapf_api import FormatCode
 
 from mindinsight.mindconverter.common.exceptions import GeneratorError
@@ -28,7 +29,7 @@ from mindinsight.mindconverter.graph_based_converter.common.outputs import BaseO
 from mindinsight.mindconverter.graph_based_converter.common.yapf_config import mindspore_yapf_config
 from mindinsight.mindconverter.graph_based_converter.common.name_mgr import GlobalVarNameMgr
 from mindinsight.mindconverter.graph_based_converter.constant import NEW_LINE, SECOND_LEVEL_INDENT, \
-    FIRST_LEVEL_INDENT, get_imported_module
+    FIRST_LEVEL_INDENT, get_imported_module, SEPARATOR_BTW_NAME_AND_ID
 from mindinsight.mindconverter.graph_based_converter.report_generator import ReportGenerator
 from mindinsight.mindconverter.graph_based_converter.common.utils import replace_string_in_list
 
@@ -469,6 +470,74 @@ class Generator:
         """Return all ModuleStructs in this model."""
         return self._module_struct_collections
 
+    def generate_weight_scope_name(self, node):
+        """Generate weight scope name for checkpoint."""
+        replaced_module_dict = self.node_structs[node].global_context_mgr.known_module_name
+        scope_list = self.node_structs[node].scope.scope_list
+        ms_var_name = self.node_structs[node].ms_var_name
+
+        weight_scope_name = None
+        for scope in scope_list[1:]:
+            replaced_module = replaced_module_dict.get(scope.split(SEPARATOR_BTW_NAME_AND_ID)[0])
+            if replaced_module:
+                scope = scope.replace(scope.split(SEPARATOR_BTW_NAME_AND_ID)[0], replaced_module)
+            if not weight_scope_name:
+                weight_scope_name = scope
+            else:
+                weight_scope_name = '.'.join((weight_scope_name, scope))
+
+        if not weight_scope_name:
+            weight_scope_name = ms_var_name
+        else:
+            weight_scope_name = '.'.join((weight_scope_name, ms_var_name))
+
+        return weight_scope_name.lower()
+
+    def generate_checkpoint(self):
+        """Generate checkpoint."""
+
+        trainable_weights_dict = dict()
+        weight_map = list()
+        for node_name, node_inst in self.node_structs.items():
+            if node_inst.fragment.exchange_msg['var_0']['trainable_params']:
+                weights_scope_name = self.generate_weight_scope_name(node_name)
+                onnx_weight_inst = node_inst.fragment.exchange_msg['var_0']['weights']
+                for idx, (weight_key, weight_value) in \
+                        enumerate(node_inst.fragment.exchange_msg['var_0']['trainable_params'].items()):
+                    weight_name = '.'.join((weights_scope_name, weight_key))
+                    weight_shape = Tensor(weight_value).shape
+                    data_type = Tensor(weight_value).dtype
+                    trainable_weights_dict[weight_name] = weight_value
+
+                    onnx_weight_name = onnx_weight_inst[idx].name
+                    onnx_weight_shape = onnx_weight_inst[idx].value.shape
+                    onnx_data_type = onnx_weight_inst[idx].value.dtype
+
+                    weight_map.append(
+                        {
+                            'converted_weight': {
+                                'name': weight_name,
+                                'shape': weight_shape,
+                                'data_type': str(data_type)
+                            },
+                            'source_weight': {
+                                'name': onnx_weight_name,
+                                'shape': onnx_weight_shape,
+                                'data_type': str(onnx_data_type)
+                            }
+                        }
+                    )
+
+        save_obj = list()
+        for weight_name, weight_value in trainable_weights_dict.items():
+            obj = {
+                'name': weight_name,
+                'data': Tensor(weight_value)
+            }
+            save_obj.append(obj)
+
+        return save_obj, weight_map
+
     @GeneratorError.check_except("Generator occurs an error when generating code statements.")
     def generate(self):
         """
@@ -479,6 +548,9 @@ class Generator:
         """
         self._form_bottom_submodule()
         self._recursive_form_module()
+
+        ckpt_data_list, weight_map = self.generate_checkpoint()
+
         CodeStruct(self.module_structs.get('[]'), self._repeated_submodules)
 
         outputs = [get_imported_module()]
@@ -494,7 +566,7 @@ class Generator:
         report = report_generator.gen_report(formatted_code)
         del self._global_context
 
-        return {"model": (formatted_code, report)}
+        return {"model": (formatted_code, report, ckpt_data_list, weight_map)}
 
     def get_node_struct(self, node_identifier):
         """
diff --git a/mindinsight/mindconverter/graph_based_converter/generator/module_struct.py b/mindinsight/mindconverter/graph_based_converter/generator/module_struct.py
index 22ae05ed..3b366f08 100644
--- a/mindinsight/mindconverter/graph_based_converter/generator/module_struct.py
+++ b/mindinsight/mindconverter/graph_based_converter/generator/module_struct.py
@@ -17,13 +17,13 @@
 import copy
 from collections import OrderedDict
 
-from .node_struct import NodeStruct
-from .scope_utils import Scope
-from ..common.utils import get_dict_key_by_value
-from .args_translator import ArgsTranslation
-from ..common.code_fragment import ModuleFragment
-from ..common.global_context import GlobalContext
-from ..common.name_mgr import LocalVarNameMgr
+from mindinsight.mindconverter.graph_based_converter.generator.node_struct import NodeStruct
+from mindinsight.mindconverter.graph_based_converter.generator.scope_utils import Scope
+from mindinsight.mindconverter.graph_based_converter.common.utils import get_dict_key_by_value
+from mindinsight.mindconverter.graph_based_converter.generator.args_translator import ArgsTranslation
+from mindinsight.mindconverter.graph_based_converter.common.code_fragment import ModuleFragment
+from mindinsight.mindconverter.graph_based_converter.common.global_context import GlobalContext
+from mindinsight.mindconverter.graph_based_converter.common.name_mgr import LocalVarNameMgr
 
 
 class ModuleStruct:
diff --git a/mindinsight/mindconverter/graph_based_converter/generator/node_struct.py b/mindinsight/mindconverter/graph_based_converter/generator/node_struct.py
index 1b3c0e01..d9707d86 100644
--- a/mindinsight/mindconverter/graph_based_converter/generator/node_struct.py
+++ b/mindinsight/mindconverter/graph_based_converter/generator/node_struct.py
@@ -17,11 +17,11 @@ from collections import OrderedDict
 
 from mindinsight.mindconverter.graph_based_converter.common.code_fragment import NewFragment
 from mindinsight.mindconverter.graph_based_converter.generator.fragment_utils import FragmentHandler
-from .scope_utils import Scope
-from .args_translator import ArgsTranslation
-from ..third_party_graph.onnx_graph_node import OnnxGraphNode
-from ..common.global_context import GlobalContext
-from ...common.exceptions import GeneratorError
+from mindinsight.mindconverter.graph_based_converter.generator.scope_utils import Scope
+from mindinsight.mindconverter.graph_based_converter.generator.args_translator import ArgsTranslation
+from mindinsight.mindconverter.graph_based_converter.third_party_graph.onnx_graph_node import OnnxGraphNode
+from mindinsight.mindconverter.graph_based_converter.common.global_context import GlobalContext
+from mindinsight.mindconverter.common.exceptions import GeneratorError
 
 
 class NodeStruct:
diff --git a/mindinsight/mindconverter/graph_based_converter/mapper/__init__.py b/mindinsight/mindconverter/graph_based_converter/mapper/__init__.py
index dadf4ad2..f29b23b4 100644
--- a/mindinsight/mindconverter/graph_based_converter/mapper/__init__.py
+++ b/mindinsight/mindconverter/graph_based_converter/mapper/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2020 Huawei Technologies Co., Ltd.All Rights Reserved.
+# Copyright 2020-2021 Huawei Technologies Co., Ltd.All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -16,4 +16,4 @@
 
 __all__ = ["ONNXToMindSporeMapper"]
 
-from .base import ONNXToMindSporeMapper
+from mindinsight.mindconverter.graph_based_converter.mapper.base import ONNXToMindSporeMapper
diff --git a/mindinsight/mindconverter/graph_based_converter/mapper/base.py b/mindinsight/mindconverter/graph_based_converter/mapper/base.py
index 609546cb..97b190a0 100644
--- a/mindinsight/mindconverter/graph_based_converter/mapper/base.py
+++ b/mindinsight/mindconverter/graph_based_converter/mapper/base.py
@@ -108,18 +108,21 @@ class ONNXToMindSporeMapper(Mapper, abc.ABC):
         try:
             converter_name = op_name_converter(params=params, weights=weights, op_name=op_name)
             converted_params = params_converter(params=params, weights=weights)
+
             if "input_shape" in converted_params:
                 converted_params.pop("input_shape")
             if "output_shape" in converted_params:
                 converted_params.pop("output_shape")
             # set to converted_weights to enable weight migration
-            _ = weights_converter(weights=weights) if weights else dict()
+            converted_weights = weights_converter(weights=weights) if weights else dict()
             code_template, exchange_msg, outputs_list, outputs_mapping = template_generator(
                 operation=converter_name,
                 converted_params=converted_params,
                 raw_params=params,
-                weights=weights
+                weights=weights,
+                trainable_params=converted_weights
             )
+
         except (AttributeError, KeyError, ValueError, TypeError, IndexError) as e:
             err_msg = f"Converting {op_name} failed, see {str(e)}"
             log.error(err_msg)
@@ -148,6 +151,7 @@ class ONNXToMindSporeMapper(Mapper, abc.ABC):
         op = kwargs.get("operation")
         args = kwargs.get("converted_params", dict())
         weights = kwargs.get("weights")
+        trainable_params = kwargs.get("trainable_params", dict())
         if not op:
             raise ValueError("Can not get MindSpore operation name.")
         variable_slot = "var_0"
@@ -169,7 +173,7 @@ class ONNXToMindSporeMapper(Mapper, abc.ABC):
                 ExchangeMessageKeywords.VariableScope.value.INPUTS.value: [],
                 ExchangeMessageKeywords.VariableScope.value.ARGS.value: args,
                 ExchangeMessageKeywords.VariableScope.value.WEIGHTS.value: weights,
-                ExchangeMessageKeywords.VariableScope.value.TRAINABLE_PARAMS.value: {}
+                ExchangeMessageKeywords.VariableScope.value.TRAINABLE_PARAMS.value: trainable_params
             }
         }
         outputs_list = [f"opt_{{{variable_slot}}}"]
@@ -177,11 +181,14 @@ class ONNXToMindSporeMapper(Mapper, abc.ABC):
         return template, exchange_msg, outputs_list, outputs_mapping
 
     @staticmethod
-    def _find_val_by_index(loc_index, values_dict):
-        """Find value by location index of values_dict."""
+    def _find_val_by_index(loc_index, weights_list):
+        """Find value by location index of weights_list."""
         result = None
-        for idx, dict_val in enumerate(values_dict.values()):
+        if loc_index < 0:
+            return weights_list[loc_index].value
+
+        for idx, weight in enumerate(weights_list):
             if idx == loc_index:
-                result = dict_val
+                result = weight.value
                 break
         return result
diff --git a/mindinsight/mindconverter/graph_based_converter/mapper/impl/nn/batch_norm_mapper.py b/mindinsight/mindconverter/graph_based_converter/mapper/impl/nn/batch_norm_mapper.py
index e7c51548..5a4591df 100644
--- a/mindinsight/mindconverter/graph_based_converter/mapper/impl/nn/batch_norm_mapper.py
+++ b/mindinsight/mindconverter/graph_based_converter/mapper/impl/nn/batch_norm_mapper.py
@@ -14,7 +14,6 @@
 # ==============================================================================
 """Mapper module."""
 from mindinsight.mindconverter.graph_based_converter.mapper.base import ONNXToMindSporeMapper
-from mindinsight.mindconverter.graph_based_converter.mapper.gen_setting import Setting
 
 
 class BatchNormMapper(ONNXToMindSporeMapper):
@@ -36,8 +35,14 @@ class BatchNormMapper(ONNXToMindSporeMapper):
 
     @staticmethod
     def _convert_trained_weights(**kwargs):
-        return dict()
-
-    @staticmethod
-    def _convert_settings(**kwargs):
-        return Setting()
+        weights = kwargs['weights']
+        gamma = BatchNormMapper._find_val_by_index(0, weights)
+        beta = BatchNormMapper._find_val_by_index(1, weights)
+        moving_mean = BatchNormMapper._find_val_by_index(2, weights)
+        moving_variance = BatchNormMapper._find_val_by_index(3, weights)
+        return {
+            'gamma': gamma,
+            'beta': beta,
+            'moving_mean': moving_mean,
+            'moving_variance': moving_variance
+        }
diff --git a/mindinsight/mindconverter/graph_based_converter/mapper/impl/nn/conv_mapper.py b/mindinsight/mindconverter/graph_based_converter/mapper/impl/nn/conv_mapper.py
index 3100f555..cdad6167 100644
--- a/mindinsight/mindconverter/graph_based_converter/mapper/impl/nn/conv_mapper.py
+++ b/mindinsight/mindconverter/graph_based_converter/mapper/impl/nn/conv_mapper.py
@@ -14,7 +14,6 @@
 # ==============================================================================
 """Mapper module."""
 import numpy as np
-from mindinsight.mindconverter.graph_based_converter.mapper.gen_setting import Setting
 from mindinsight.mindconverter.graph_based_converter.mapper.base import ONNXToMindSporeMapper
 from mindinsight.mindconverter.graph_based_converter.common.utils import convert_bytes_string_to_string
 
@@ -42,7 +41,7 @@ class ConvMapper(ONNXToMindSporeMapper):
         """Convert params from PyTorch to MindSpore"""
         weights = kwargs['weights']
         params = kwargs['params']
-        weight = weights['weight']
+        weight = ConvMapper._find_val_by_index(0, weights)
         weight = np.transpose(weight, list(range(2, weight.ndim)) + [1, 0])
         if isinstance(params['dilations'], list):
             dilation = tuple(params['dilations'])
@@ -76,11 +75,13 @@ class ConvMapper(ONNXToMindSporeMapper):
         """Convert params from Tensorflow to MindSpore"""
         weights = kwargs['weights']
         params = kwargs['params']
-        # regex to find Conv weight
-        weight = list(weights.values())[0]
+        weight = ConvMapper._find_val_by_index(0, weights)
+        bias = ConvMapper._find_val_by_index(1, weights)
         if weight is None:
             raise ValueError("Conv. Mapper cannot get the weight.")
 
+        has_bias = isinstance(bias, np.ndarray)
+
         auto_pad = None
         if params.get("auto_pad") is not None:
             auto_pad = convert_bytes_string_to_string(params.get("auto_pad"))
@@ -119,18 +120,14 @@ class ConvMapper(ONNXToMindSporeMapper):
             'padding': padding,
             'pad_mode': pad_mode,
             'dilation': dilation,
-            'group': params.get('group', 1)}
+            'group': params.get('group', 1),
+            'has_bias': has_bias
+        }
 
     @staticmethod
     def _operation_name_in_ms(*args, **kwargs):
-        weight = kwargs['weights'].get('weight', 'empty')
-
-        if weight == 'empty':  # is from tf
-            kernel_size = kwargs['params'].get('kernel_shape')
-            dim = len(kernel_size)
-            return f"nn.Conv{dim}d"
-
-        dim = weight.ndim - 2
+        kernel_size = kwargs['params'].get('kernel_shape')
+        dim = len(kernel_size)
         return f"nn.Conv{dim}d"
 
     @staticmethod
@@ -138,14 +135,16 @@ class ConvMapper(ONNXToMindSporeMapper):
         weights = kwargs['weights']
         params = kwargs['params']
 
-        if weights.get('weight', 'empty') == 'empty':  # is from tf
-            return ConvMapper.convert_params_tf(params=params, weights=weights)
-        return ConvMapper.convert_params_torch(params=params, weights=weights)
+        return ConvMapper.convert_params_tf(params=params, weights=weights)
 
     @staticmethod
     def _convert_trained_weights(**kwargs):
-        return dict()
+        weights = kwargs['weights']
+        weight = ConvMapper._find_val_by_index(0, weights)
+        bias = ConvMapper._find_val_by_index(1, weights)
 
-    @staticmethod
-    def _convert_settings(**kwargs):
-        return Setting()
+        converted_weights = {'weight': weight}
+        if isinstance(bias, np.ndarray):
+            converted_weights['bias'] = bias
+
+        return converted_weights
diff --git a/mindinsight/mindconverter/graph_based_converter/mapper/impl/nn/dense_mapper.py b/mindinsight/mindconverter/graph_based_converter/mapper/impl/nn/dense_mapper.py
index 2c1cb219..f65f5a06 100644
--- a/mindinsight/mindconverter/graph_based_converter/mapper/impl/nn/dense_mapper.py
+++ b/mindinsight/mindconverter/graph_based_converter/mapper/impl/nn/dense_mapper.py
@@ -15,7 +15,6 @@
 """Mapper module."""
 import numpy as np
 from mindinsight.mindconverter.graph_based_converter.mapper.base import ONNXToMindSporeMapper
-from mindinsight.mindconverter.graph_based_converter.mapper.gen_setting import Setting
 
 
 class DenseMapper(ONNXToMindSporeMapper):
@@ -42,8 +41,10 @@ class DenseMapper(ONNXToMindSporeMapper):
 
     @staticmethod
     def _convert_trained_weights(**kwargs):
-        return dict()
-
-    @staticmethod
-    def _convert_settings(**kwargs):
-        return Setting()
+        weights = kwargs['weights']
+        weight = DenseMapper._find_val_by_index(0, weights)
+        bias = DenseMapper._find_val_by_index(1, weights)
+        return {
+            'weight': weight,
+            'bias': bias
+        }
diff --git a/mindinsight/mindconverter/graph_based_converter/mapper/impl/nn/mat_mul_mapper.py b/mindinsight/mindconverter/graph_based_converter/mapper/impl/nn/mat_mul_mapper.py
index 2cf809d7..805fe9d7 100644
--- a/mindinsight/mindconverter/graph_based_converter/mapper/impl/nn/mat_mul_mapper.py
+++ b/mindinsight/mindconverter/graph_based_converter/mapper/impl/nn/mat_mul_mapper.py
@@ -30,7 +30,9 @@ class MatMulMapper(ONNXToMindSporeMapper):
 
     @staticmethod
     def _convert_trained_weights(**kwargs):
-        return dict()
+        weights = kwargs['weights']
+        weight = MatMulMapper._find_val_by_index(0, weights)
+        return {'weight': weight}
 
     @staticmethod
     def _generate_snippet_template(**kwargs):
@@ -44,8 +46,7 @@ class MatMulMapper(ONNXToMindSporeMapper):
         if not weights:
             return template, exchange_msg, outputs_list, outputs_mapping
 
-        weight = list(weights.items())[0]
-        _, tensor = weight
+        tensor = MatMulMapper._find_val_by_index(0, weights)
 
         variable_slot = "var_0"
         init_template = f"self.{{{variable_slot}}} = {op}({', '.join(['%s={%s}' % (p, p) for p in args])})"
diff --git a/mindinsight/mindconverter/graph_based_converter/mapper/impl/nn/pad_mapper.py b/mindinsight/mindconverter/graph_based_converter/mapper/impl/nn/pad_mapper.py
index 6dedee16..027fdedb 100644
--- a/mindinsight/mindconverter/graph_based_converter/mapper/impl/nn/pad_mapper.py
+++ b/mindinsight/mindconverter/graph_based_converter/mapper/impl/nn/pad_mapper.py
@@ -15,7 +15,6 @@
 """Mapper module."""
 from mindinsight.mindconverter.graph_based_converter.common.utils import convert_bytes_string_to_string
 from mindinsight.mindconverter.graph_based_converter.mapper.base import ONNXToMindSporeMapper
-from mindinsight.mindconverter.graph_based_converter.mapper.gen_setting import Setting
 
 
 def _padding_format_convert(padding: list):
@@ -49,7 +48,7 @@ class PadMapper(ONNXToMindSporeMapper):
         weights = kwargs.get("weights")
         params = kwargs.get("params")
         mode = convert_bytes_string_to_string(params.get('mode', 'constant'))
-        pads_onnx = params.get("pads") if params.get("pads") else list(weights.values())[0].tolist()
+        pads_onnx = params.get("pads") if params.get("pads") else PadMapper._find_val_by_index(0, weights).tolist()
         if mode == 'constant' and params.get('value') is None:
             if params.get('pads') or weights:
                 if isinstance(pads_onnx, list):
@@ -76,7 +75,3 @@ class PadMapper(ONNXToMindSporeMapper):
     @staticmethod
     def _convert_trained_weights(**kwargs):
         return dict()
-
-    @staticmethod
-    def _convert_settings(**kwargs):
-        return Setting()
diff --git a/mindinsight/mindconverter/graph_based_converter/mapper/impl/nn/pool_mapper.py b/mindinsight/mindconverter/graph_based_converter/mapper/impl/nn/pool_mapper.py
index feae93d1..b024f096 100644
--- a/mindinsight/mindconverter/graph_based_converter/mapper/impl/nn/pool_mapper.py
+++ b/mindinsight/mindconverter/graph_based_converter/mapper/impl/nn/pool_mapper.py
@@ -13,12 +13,16 @@
 # limitations under the License.
 # ==============================================================================
 """Mapper module."""
+import math
+
+import numpy as np
+
 from mindinsight.mindconverter.graph_based_converter.mapper.base import ONNXToMindSporeMapper
-from mindinsight.mindconverter.graph_based_converter.mapper.gen_setting import Setting
+from mindinsight.mindconverter.graph_based_converter.constant import ExchangeMessageKeywords, TemplateKeywords
 
 
 class PoolMapper(ONNXToMindSporeMapper):
-    """MaxPool mapper."""
+    """Pool mapper."""
 
     @staticmethod
     def _operation_name_in_ms(*args, **kwargs):
@@ -35,12 +39,6 @@ class PoolMapper(ONNXToMindSporeMapper):
         transformed_params = dict()
         transformed_params["kernel_size"] = tuple(params['kernel_shape'])
         transformed_params["stride"] = tuple(params['strides'])
-        if "pads" in params:
-            if sum(params['pads']) == 0 and not params.get('ceil_mode', None):
-                pad_mode = '\"valid\"'
-            else:
-                pad_mode = '\"same\"'
-            transformed_params["pad_mode"] = pad_mode
 
         return transformed_params
 
@@ -49,5 +47,100 @@ class PoolMapper(ONNXToMindSporeMapper):
         return dict()
 
     @staticmethod
-    def _convert_settings(**kwargs):
-        return Setting()
+    def _get_ms_opt_shape(**kwargs):
+        """Get output shape in MindSpore."""
+        params = kwargs['raw_params']
+        input_shape = params['input_shape']
+        kernel_shape = params['kernel_shape']
+        strides = params['strides']
+        dilations = params.get('dilations', (1, 1))
+        # For mindspore,
+        # output_shape[i] = ceil((input_shape[i] - ((kernel_shape[i] - 1) * dilations[i] + 1) + 1) / strides[i])
+        ms_opt_shape = np.true_divide(np.subtract(np.array(input_shape[-len(kernel_shape):], dtype=np.float32),
+                                                  ((np.array(kernel_shape, dtype=np.float32) - 1) *
+                                                   np.array(dilations, dtype=np.float32) + 1)) + 1,
+                                      np.array(strides, dtype=np.float32)).tolist()
+        ms_opt_shape_ceil = tuple(math.ceil(ms_opt_shape_axis) for ms_opt_shape_axis in ms_opt_shape)
+        return ms_opt_shape_ceil
+
+    @staticmethod
+    def _generate_snippet_template(**kwargs):
+        template, exchange_msg, outputs_list, outputs_mapping = ONNXToMindSporeMapper._generate_snippet_template(
+            **kwargs)
+        op = kwargs.get("operation")
+        args = kwargs.get("converted_params", dict())
+
+        ms_opt_shape = PoolMapper._get_ms_opt_shape(**kwargs)
+        tensor_opt_shape = kwargs['raw_params']['output_shape']
+        tensor_ipt_shape = kwargs['raw_params']['input_shape']
+        kernel_shape = kwargs['raw_params']['kernel_shape']
+        dilations = kwargs['raw_params'].get('dilations', (1, 1))
+        strides = kwargs['raw_params']['strides']
+        onnx_opt_shape = tensor_opt_shape[-len(ms_opt_shape):]
+
+        if np.all(np.array(ms_opt_shape) == np.array(onnx_opt_shape)):
+            return template, exchange_msg, outputs_list, outputs_mapping
+
+        variable_slot = "var_0"
+        init_template = f"self.{{{variable_slot}}} = {op}({', '.join(['%s={%s}' % (p, p) for p in args])})"
+        construct_template = f"opt_{{{variable_slot}}} = self.{{{variable_slot}}}(opt_{{{variable_slot}}})"
+
+        init_template_pad, construct_template_pad, paddings = \
+            PoolMapper._generate_pad_init_and_construct(tensor_opt_shape, tensor_ipt_shape,
+                                                        ms_opt_shape, variable_slot,
+                                                        kernel_shape, dilations, strides)
+
+        template = {
+            variable_slot: {
+                TemplateKeywords.INIT.value: [init_template_pad, init_template],
+                TemplateKeywords.CONSTRUCT.value: [construct_template_pad, construct_template]
+            }
+        }
+
+        args['paddings'] = paddings
+
+        exchange_msg = {
+            variable_slot: {
+                ExchangeMessageKeywords.VariableScope.value.OPERATION.value: op,
+                ExchangeMessageKeywords.VariableScope.value.VARIABLE_NAME.value: None,
+                ExchangeMessageKeywords.VariableScope.value.OUTPUT_TYPE.value:
+                    ExchangeMessageKeywords.VariableScope.value.TSR_TYPE.value,
+                ExchangeMessageKeywords.VariableScope.value.INPUTS.value: [],
+                ExchangeMessageKeywords.VariableScope.value.ARGS.value: args,
+                ExchangeMessageKeywords.VariableScope.value.WEIGHTS.value: dict(),
+                ExchangeMessageKeywords.VariableScope.value.TRAINABLE_PARAMS.value: dict()
+            }
+        }
+
+        return template, exchange_msg, outputs_list, outputs_mapping
+
+    @staticmethod
+    def _generate_pad_init_and_construct(tensor_opt_shape, tensor_ipt_shape,
+                                         ms_opt_shape, variable_slot, kernel_shape, dilations, strides):
+        """Generate pad code in init and construct."""
+        onnx_opt_shape = tensor_opt_shape[-len(ms_opt_shape):]
+        onnx_ipt_shape = tensor_ipt_shape[-len(ms_opt_shape):]
+
+        if np.any(np.array(ms_opt_shape) > np.array(onnx_opt_shape)):
+            raise ValueError(f"ms_opt_shape[{ms_opt_shape}] should be no larger than onnx_opt_shape[{onnx_opt_shape}].")
+
+        # shape_diff[i] = (onnx_opt_shape[i] - 1)*strides[i] -
+        #                 (onnx_ipt_shape[i] - ((kernel_shape[i] - 1)*dilations[i] + 1))
+        shape_diff = np.subtract((np.array(onnx_opt_shape) - 1)*np.array(strides),
+                                 np.subtract(np.array(onnx_ipt_shape),
+                                             (np.array(kernel_shape) - 1)*np.array(dilations) + 1)).tolist()
+
+        zero_pad_single = (0, 0)
+        paddings = [zero_pad_single]
+        num_zero_pads = len(tensor_opt_shape) - len(ms_opt_shape)
+        for _ in range(num_zero_pads - 1):
+            paddings.append(zero_pad_single)
+
+        for axis_diff in shape_diff:
+            paddings.append((int(axis_diff//2), int(axis_diff//2 + axis_diff % 2)))
+
+        init_template_pad = f"self.pad_{{{variable_slot}}} = nn.Pad(paddings={{paddings}})"
+        construct_template_pad = f"opt_{{{variable_slot}}} = self.pad_{{{variable_slot}}}" \
+                                 f"({{{ExchangeMessageKeywords.VariableScope.value.INPUTS.value}}})"
+
+        return init_template_pad, construct_template_pad, tuple(paddings)
diff --git a/mindinsight/mindconverter/graph_based_converter/mapper/impl/ops/add_mapper.py b/mindinsight/mindconverter/graph_based_converter/mapper/impl/ops/add_mapper.py
index bac2973d..db2413d1 100644
--- a/mindinsight/mindconverter/graph_based_converter/mapper/impl/ops/add_mapper.py
+++ b/mindinsight/mindconverter/graph_based_converter/mapper/impl/ops/add_mapper.py
@@ -44,8 +44,7 @@ class AddMapper(ONNXToMindSporeMapper):
         if not weights:
             return template, exchange_msg, outputs_list, outputs_mapping
 
-        bias = list(weights.items())[0]
-        _, tensor = bias
+        tensor = AddMapper._find_val_by_index(0, weights)
 
         variable_slot = "var_0"
         init_template = f"self.{{{variable_slot}}} = {op}({', '.join(['%s={%s}' % (p, p) for p in args])})"
diff --git a/mindinsight/mindconverter/graph_based_converter/mapper/impl/ops/mul_mapper.py b/mindinsight/mindconverter/graph_based_converter/mapper/impl/ops/mul_mapper.py
index 5b3c5d1b..f47b5e7a 100644
--- a/mindinsight/mindconverter/graph_based_converter/mapper/impl/ops/mul_mapper.py
+++ b/mindinsight/mindconverter/graph_based_converter/mapper/impl/ops/mul_mapper.py
@@ -53,8 +53,7 @@ class MulMapper(ONNXToMindSporeMapper):
         if not weights:
             return template, exchange_msg, outputs_list, outputs_mapping
 
-        weight = list(weights.items())[0]
-        _, tensor = weight
+        tensor = MulMapper._find_val_by_index(0, weights)
 
         variable_slot = "var_0"
         init_template = f"self.{{{variable_slot}}} = {op}({', '.join(['%s={%s}' % (p, p) for p in args])})"
diff --git a/mindinsight/mindconverter/graph_based_converter/mapper/impl/ops/resize_mapper.py b/mindinsight/mindconverter/graph_based_converter/mapper/impl/ops/resize_mapper.py
index 9aa7a3cf..81b4938e 100644
--- a/mindinsight/mindconverter/graph_based_converter/mapper/impl/ops/resize_mapper.py
+++ b/mindinsight/mindconverter/graph_based_converter/mapper/impl/ops/resize_mapper.py
@@ -60,7 +60,7 @@ class ResizeMapper(ONNXToMindSporeMapper):
             align_corners = True
 
         # Get requested size for resize
-        size = list(weights.values())[-1][-2:].tolist()
+        size = ResizeMapper._find_val_by_index(-1, weights)[-2:].tolist()
 
         return {"size": tuple(size),
                 "align_corners": align_corners}
diff --git a/mindinsight/mindconverter/graph_based_converter/mapper/impl/ops/slice_mapper.py b/mindinsight/mindconverter/graph_based_converter/mapper/impl/ops/slice_mapper.py
index 24b27943..481ea272 100644
--- a/mindinsight/mindconverter/graph_based_converter/mapper/impl/ops/slice_mapper.py
+++ b/mindinsight/mindconverter/graph_based_converter/mapper/impl/ops/slice_mapper.py
@@ -48,7 +48,7 @@ class SliceMapper(ONNXToMindSporeMapper):
     def _generate_snippet_template(**kwargs):
         template, exchange_msg, outputs_list, outputs_mapping = ONNXToMindSporeMapper._generate_snippet_template(
             **kwargs)
-        weights = list(kwargs.get("weights").values())  # start, end, axis
+        weights = [weight.value for weight in kwargs.get('weights')] # start, end, axis
         opt_shape = kwargs["raw_params"]["output_shape"]
         if not weights:
             raise ValueError("Cannot get required params from slice.")
diff --git a/mindinsight/mindconverter/graph_based_converter/sub_graph_searcher/__init__.py b/mindinsight/mindconverter/graph_based_converter/sub_graph_searcher/__init__.py
index c4893f16..5ebea156 100644
--- a/mindinsight/mindconverter/graph_based_converter/sub_graph_searcher/__init__.py
+++ b/mindinsight/mindconverter/graph_based_converter/sub_graph_searcher/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2020 Huawei Technologies Co., Ltd.All Rights Reserved.
+# Copyright 2020-2021 Huawei Technologies Co., Ltd.All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -15,4 +15,4 @@
 """Searcher of scope name."""
 __all__ = ["generate_scope_name"]
 
-from .searcher import generate_scope_name
+from mindinsight.mindconverter.graph_based_converter.sub_graph_searcher.searcher import generate_scope_name
diff --git a/mindinsight/mindconverter/graph_based_converter/sub_graph_searcher/built_in_pattern.py b/mindinsight/mindconverter/graph_based_converter/sub_graph_searcher/built_in_pattern.py
index 7049b74d..aafe7055 100644
--- a/mindinsight/mindconverter/graph_based_converter/sub_graph_searcher/built_in_pattern.py
+++ b/mindinsight/mindconverter/graph_based_converter/sub_graph_searcher/built_in_pattern.py
@@ -1,4 +1,4 @@
-# Copyright 2020 Huawei Technologies Co., Ltd.All Rights Reserved.
+# Copyright 2020-2021 Huawei Technologies Co., Ltd.All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -16,8 +16,8 @@
 
 __all__ = ["BUILT_IN_PATTERN", "register_pattern", "is_built_in_pattern"]
 
-from .common import cal_matching_score
-from .pattern import Pattern
+from mindinsight.mindconverter.graph_based_converter.sub_graph_searcher.common import cal_matching_score
+from mindinsight.mindconverter.graph_based_converter.sub_graph_searcher.pattern import Pattern
 
 BUILT_IN_PATTERN = dict()
 
diff --git a/mindinsight/mindconverter/graph_based_converter/sub_graph_searcher/search_path.py b/mindinsight/mindconverter/graph_based_converter/sub_graph_searcher/search_path.py
index bc573ae8..ac706c8c 100644
--- a/mindinsight/mindconverter/graph_based_converter/sub_graph_searcher/search_path.py
+++ b/mindinsight/mindconverter/graph_based_converter/sub_graph_searcher/search_path.py
@@ -1,4 +1,4 @@
-# Copyright 2020 Huawei Technologies Co., Ltd.All Rights Reserved.
+# Copyright 2020-2021 Huawei Technologies Co., Ltd.All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -17,12 +17,15 @@ import copy
 import uuid
 from typing import Dict, List, Callable, Union
 from collections import OrderedDict
-from .common import context, gen_hash_key, DagGraph, MAX_OUT_DEGREE, cal_matching_score
-from .known_module_name import BUILT_IN_MODULE_NAME
-from .pattern import Pattern, scope_name_mapping
-from .built_in_pattern import BUILT_IN_PATTERN, is_built_in_pattern
-from .pattern_fuzzy_matching import pattern_fuzzy_matching
-from ..third_party_graph.onnx_utils import OnnxNode, BaseNode
+from mindinsight.mindconverter.graph_based_converter.sub_graph_searcher.common import context, gen_hash_key, DagGraph, \
+    MAX_OUT_DEGREE, cal_matching_score
+from mindinsight.mindconverter.graph_based_converter.sub_graph_searcher.known_module_name import BUILT_IN_MODULE_NAME
+from mindinsight.mindconverter.graph_based_converter.sub_graph_searcher.pattern import Pattern, scope_name_mapping
+from mindinsight.mindconverter.graph_based_converter.sub_graph_searcher.built_in_pattern import BUILT_IN_PATTERN, \
+    is_built_in_pattern
+from mindinsight.mindconverter.graph_based_converter.sub_graph_searcher.pattern_fuzzy_matching import \
+    pattern_fuzzy_matching
+from mindinsight.mindconverter.graph_based_converter.third_party_graph.onnx_utils import OnnxNode, BaseNode
 
 module_name_to_src = {}
 used_module_name = dict()
diff --git a/mindinsight/mindconverter/graph_based_converter/sub_graph_searcher/searcher.py b/mindinsight/mindconverter/graph_based_converter/sub_graph_searcher/searcher.py
index d61c8df0..ea8ff3c3 100644
--- a/mindinsight/mindconverter/graph_based_converter/sub_graph_searcher/searcher.py
+++ b/mindinsight/mindconverter/graph_based_converter/sub_graph_searcher/searcher.py
@@ -16,12 +16,15 @@
 from queue import PriorityQueue
 from typing import Dict, List
 
-from .common import context, DagGraph, gen_hash_key, ACCEPTABLE_RESULT_COUNT
-from .common import MINI_FREQUENCY, MAX_ITERATION_DEPTH, SATISFIED_SCORE
-from ..common.global_context import GlobalContext
-from ..third_party_graph.onnx_utils import BaseNode
-from .search_path import SearchPath, Pattern, generate_pattern, find_built_in_pattern
-from ...common.exceptions import SubGraphSearchingError
+from mindinsight.mindconverter.graph_based_converter.sub_graph_searcher.common import context, DagGraph, gen_hash_key, \
+    ACCEPTABLE_RESULT_COUNT
+from mindinsight.mindconverter.graph_based_converter.sub_graph_searcher.common import MINI_FREQUENCY, \
+    MAX_ITERATION_DEPTH, SATISFIED_SCORE
+from mindinsight.mindconverter.graph_based_converter.common.global_context import GlobalContext
+from mindinsight.mindconverter.graph_based_converter.third_party_graph.onnx_utils import BaseNode
+from mindinsight.mindconverter.graph_based_converter.sub_graph_searcher.search_path import SearchPath, Pattern, \
+    generate_pattern, find_built_in_pattern
+from mindinsight.mindconverter.common.exceptions import SubGraphSearchingError
 
 
 def _is_satisfied(path):
diff --git a/mindinsight/mindconverter/graph_based_converter/third_party_graph/__init__.py b/mindinsight/mindconverter/graph_based_converter/third_party_graph/__init__.py
index 55424443..424c0245 100644
--- a/mindinsight/mindconverter/graph_based_converter/third_party_graph/__init__.py
+++ b/mindinsight/mindconverter/graph_based_converter/third_party_graph/__init__.py
@@ -17,7 +17,7 @@
 __all__ = ["GraphFactory"]
 from importlib import import_module
 
-from .base import Graph
+from mindinsight.mindconverter.graph_based_converter.third_party_graph.base import Graph
 
 
 class GraphFactory:
diff --git a/mindinsight/mindconverter/graph_based_converter/third_party_graph/input_node.py b/mindinsight/mindconverter/graph_based_converter/third_party_graph/input_node.py
index 8f75451e..a7090078 100644
--- a/mindinsight/mindconverter/graph_based_converter/third_party_graph/input_node.py
+++ b/mindinsight/mindconverter/graph_based_converter/third_party_graph/input_node.py
@@ -1,4 +1,4 @@
-# Copyright 2020 Huawei Technologies Co., Ltd.All Rights Reserved.
+# Copyright 2020-2021 Huawei Technologies Co., Ltd.All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -15,8 +15,8 @@
 """Define PyTorch graph node."""
 import os
 
-from .base import GraphNode
-from ..constant import SEPARATOR_IN_SCOPE, NodeType
+from mindinsight.mindconverter.graph_based_converter.third_party_graph.base import GraphNode
+from mindinsight.mindconverter.graph_based_converter.constant import SEPARATOR_IN_SCOPE, NodeType
 
 
 class InputNode(GraphNode):
@@ -25,7 +25,6 @@ class InputNode(GraphNode):
 
     Args:
         input_shape: Input shape of module.
-
     """
 
     def _get_arg_name(self, arg, variable_name):
diff --git a/mindinsight/mindconverter/graph_based_converter/third_party_graph/onnx_graph.py b/mindinsight/mindconverter/graph_based_converter/third_party_graph/onnx_graph.py
index 74b6d4fc..3c3060c6 100644
--- a/mindinsight/mindconverter/graph_based_converter/third_party_graph/onnx_graph.py
+++ b/mindinsight/mindconverter/graph_based_converter/third_party_graph/onnx_graph.py
@@ -17,12 +17,12 @@ from importlib import import_module
 from typing import Dict, NoReturn
 
 from mindinsight.mindconverter.common.log import logger as log
-from .base import Graph
-from .input_node import InputNode
-from .onnx_graph_node import OnnxGraphNode
-from .pytorch_graph_parser import PyTorchGraphParser
-from .tf_graph_parser import TFGraphParser
-from .onnx_utils import OnnxDataLoader
+from mindinsight.mindconverter.graph_based_converter.third_party_graph.base import Graph
+from mindinsight.mindconverter.graph_based_converter.third_party_graph.input_node import InputNode
+from mindinsight.mindconverter.graph_based_converter.third_party_graph.onnx_graph_node import OnnxGraphNode
+from mindinsight.mindconverter.graph_based_converter.third_party_graph.pytorch_graph_parser import PyTorchGraphParser
+from mindinsight.mindconverter.graph_based_converter.third_party_graph.tf_graph_parser import TFGraphParser
+from mindinsight.mindconverter.graph_based_converter.third_party_graph.onnx_utils import OnnxDataLoader, NodeWeight
 
 NONE_SCOPE_OP = {
     "onnx::Add": "Add",
@@ -126,7 +126,7 @@ class OnnxGraph(Graph):
 
         self._shape_dict = model_data.node_output_shape_dict
         for ind, (node_name, node) in enumerate(model_data.nodes_dict.items()):
-            node_weight = {}
+            node_weights = list()
             node.scope_name = scope_name_list[ind]
             inputs = node.input_name_list
             # check each input from node or tensors
@@ -135,8 +135,8 @@ class OnnxGraph(Graph):
                     tensor = model_data.tensors_dict[i]
                     t_name = tensor.name
                     t_value = tensor.to_array()
-                    node_weight[t_name] = t_value
-            self._nodes_collection[node_name] = OnnxGraphNode(node, node_weight)
+                    node_weights.append(NodeWeight(t_name, t_value))
+            self._nodes_collection[node_name] = OnnxGraphNode(node, node_weights)
             self._nodes_record[node_name] = node_name
 
             for nd_ipt_name in node.precursor_onnx_node_dict:
diff --git a/mindinsight/mindconverter/graph_based_converter/third_party_graph/onnx_graph_node.py b/mindinsight/mindconverter/graph_based_converter/third_party_graph/onnx_graph_node.py
index 3158c082..913c02c1 100644
--- a/mindinsight/mindconverter/graph_based_converter/third_party_graph/onnx_graph_node.py
+++ b/mindinsight/mindconverter/graph_based_converter/third_party_graph/onnx_graph_node.py
@@ -1,4 +1,4 @@
-# Copyright 2020 Huawei Technologies Co., Ltd.All Rights Reserved.
+# Copyright 2020-2021 Huawei Technologies Co., Ltd.All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -15,11 +15,11 @@
 """Define ONNX graph node."""
 from importlib import import_module
 
-from .base import GraphNode
-from ..common.utils import is_converted
+from mindinsight.mindconverter.graph_based_converter.third_party_graph.base import GraphNode
+from mindinsight.mindconverter.graph_based_converter.common.utils import is_converted
 
-from ..constant import NodeType, SEPARATOR_IN_SCOPE, SEPARATOR_BTW_NAME_AND_ID, LEFT_BUCKET, RIGHT_BUCKET, \
-    SEPARATOR_IN_ONNX_OP
+from mindinsight.mindconverter.graph_based_converter.constant import NodeType, SEPARATOR_IN_SCOPE, \
+    SEPARATOR_BTW_NAME_AND_ID, LEFT_BUCKET, RIGHT_BUCKET, SEPARATOR_IN_ONNX_OP
 
 
 class OnnxGraphNode(GraphNode):
@@ -28,7 +28,7 @@ class OnnxGraphNode(GraphNode):
 
     Args:
         node (OnnxNode): OnnxNode Object.
-        weight (dict): Dictionary records weight and bias.
+        weight (list): List of recording node weights.
     """
     _type_frozen = False
     _module_name_frozen = False
@@ -227,7 +227,6 @@ class OnnxGraphNode(GraphNode):
         Args:
             src_arg (str): Original arg name.
             tgt_arg (str): Target arg name.
-
         """
         self._args_in_code[src_arg] = tgt_arg
 
diff --git a/mindinsight/mindconverter/graph_based_converter/third_party_graph/onnx_utils.py b/mindinsight/mindconverter/graph_based_converter/third_party_graph/onnx_utils.py
index 59efa333..dc9b3295 100644
--- a/mindinsight/mindconverter/graph_based_converter/third_party_graph/onnx_utils.py
+++ b/mindinsight/mindconverter/graph_based_converter/third_party_graph/onnx_utils.py
@@ -22,13 +22,13 @@ from typing import Union
 import numpy as np
 
 from mindinsight.mindconverter.common.log import logger as log
-from ..common.utils import fetch_output_from_onnx_model
-from ..common.global_context import GlobalContext
-from .optimizer import OnnxSimplify
+from mindinsight.mindconverter.graph_based_converter.common.utils import fetch_output_from_onnx_model
+from mindinsight.mindconverter.graph_based_converter.common.global_context import GlobalContext
+from mindinsight.mindconverter.graph_based_converter.third_party_graph.optimizer import OnnxSimplify
 
-from ..constant import ONNX_TYPE_INT, ONNX_TYPE_INTS, ONNX_TYPE_STRING, \
+from mindinsight.mindconverter.graph_based_converter.constant import ONNX_TYPE_INT, ONNX_TYPE_INTS, ONNX_TYPE_STRING, \
     ONNX_TYPE_FLOATS, ONNX_TYPE_FLOAT, SCALAR_WITHOUT_SHAPE, DYNAMIC_SHAPE, UNKNOWN_DIM_VAL
-from ...common.exceptions import GraphInitError, ModelLoadingError
+from mindinsight.mindconverter.common.exceptions import GraphInitError, ModelLoadingError
 
 
 def convert_tf_graph_to_onnx(model_path, model_inputs, model_outputs, opset=12):
@@ -128,7 +128,6 @@ class ParamsAttribute:
         raw_attribute (onnx.AttributeProto): onnx.AttributeProto instance.
         node (onnx.NodeProto): Must pass the onnx.NodeProto instance
                                 containing the same AttributeProto.
-
     """
 
     def __init__(self, raw_attribute, node):
@@ -148,7 +147,6 @@ class ParamsAttribute:
 
         Args:
             attrs (onnx.AttributeProto): onnx.AttributeProto instance.
-
         """
         if not attrs:
             return
@@ -604,3 +602,18 @@ class OnnxDataLoader:
             eliminated_nodes = _traceback_precursor_nodes_until_shape_op(to_shape)
             self.dynamic_resize_node.append(nd_name)
             self.eliminated_nodes += eliminated_nodes
+
+
+class NodeWeight:
+    """Node weight struct."""
+    def __init__(self, weight_name, weight_value):
+        self._weight_name = weight_name
+        self._weight_value = weight_value
+
+    @property
+    def name(self):
+        return self._weight_name
+
+    @property
+    def value(self):
+        return self._weight_value
diff --git a/mindinsight/mindconverter/graph_based_converter/third_party_graph/optimizer.py b/mindinsight/mindconverter/graph_based_converter/third_party_graph/optimizer.py
index 63c0476f..179c220e 100644
--- a/mindinsight/mindconverter/graph_based_converter/third_party_graph/optimizer.py
+++ b/mindinsight/mindconverter/graph_based_converter/third_party_graph/optimizer.py
@@ -18,7 +18,7 @@ from importlib import import_module
 
 import numpy as np
 
-from ..common.utils import fetch_output_from_onnx_model
+from mindinsight.mindconverter.graph_based_converter.common.utils import fetch_output_from_onnx_model
 
 
 class OnnxSimplify:
diff --git a/mindinsight/mindconverter/graph_based_converter/third_party_graph/pytorch_graph_parser.py b/mindinsight/mindconverter/graph_based_converter/third_party_graph/pytorch_graph_parser.py
index 9dd20995..597e96e6 100644
--- a/mindinsight/mindconverter/graph_based_converter/third_party_graph/pytorch_graph_parser.py
+++ b/mindinsight/mindconverter/graph_based_converter/third_party_graph/pytorch_graph_parser.py
@@ -20,6 +20,7 @@ from mindinsight.mindconverter.common.log import logger as log
 from mindinsight.mindconverter.graph_based_converter.third_party_graph.base import GraphParser
 from mindinsight.mindconverter.common.exceptions import ModelNotSupportError
 
+
 class PyTorchGraphParser(GraphParser):
     """Define pytorch graph parser."""
 
diff --git a/mindinsight/mindconverter/graph_based_converter/third_party_graph/tf_graph_parser.py b/mindinsight/mindconverter/graph_based_converter/third_party_graph/tf_graph_parser.py
index 952506f9..0f1c1ba0 100644
--- a/mindinsight/mindconverter/graph_based_converter/third_party_graph/tf_graph_parser.py
+++ b/mindinsight/mindconverter/graph_based_converter/third_party_graph/tf_graph_parser.py
@@ -1,4 +1,4 @@
-# Copyright 2020 Huawei Technologies Co., Ltd.All Rights Reserved.
+# Copyright 2020-2021 Huawei Technologies Co., Ltd.All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -18,8 +18,8 @@ import re
 from importlib import import_module
 
 from mindinsight.mindconverter.common.log import logger as log
-from .base import GraphParser
-from ...common.exceptions import ModelNotSupportError
+from mindinsight.mindconverter.graph_based_converter.third_party_graph.base import GraphParser
+from mindinsight.mindconverter.common.exceptions import ModelNotSupportError
 
 
 class TFGraphParser(GraphParser):
diff --git a/tests/ut/mindconverter/graph_based_converter/mapper/test_mapper.py b/tests/ut/mindconverter/graph_based_converter/mapper/test_mapper.py
index cd31fdc3..6ebdfce9 100644
--- a/tests/ut/mindconverter/graph_based_converter/mapper/test_mapper.py
+++ b/tests/ut/mindconverter/graph_based_converter/mapper/test_mapper.py
@@ -89,7 +89,9 @@ class TestMappers:
         'input': {'op_name': 'onnx::MaxPool',
                   'params': {'kernel_shape': [3, 3],
                              'pads': [1, 1, 1, 1],
-                             'strides': [2, 2]},
+                             'strides': [2, 2],
+                             'input_shape': (1, 3, 224, 224),
+                             'output_shape': (1, 3, 112, 112)},
                   'weights': dict()},
         'expected_output': {'converter_name': 'nn.MaxPool2d',
                             'converted_params': {'kernel_size': (3, 3),
@@ -100,7 +102,9 @@ class TestMappers:
         'input': {'op_name': 'onnx::AveragePool',
                   'params': {'kernel_shape': [3, 3],
                              'pads': [1, 1, 1, 1],
-                             'strides': [2, 2]},
+                             'strides': [2, 2],
+                             'input_shape': (1, 3, 224, 224),
+                             'output_shape': (1, 3, 112, 112)},
                   'weights': dict()},
         'expected_output': {'converter_name': 'nn.AvgPool2d',
                             'converted_params': {'kernel_size': (3, 3),
diff --git a/tests/utils/mindspore/train/serialization.py b/tests/utils/mindspore/train/serialization.py
new file mode 100644
index 00000000..6f2278a4
--- /dev/null
+++ b/tests/utils/mindspore/train/serialization.py
@@ -0,0 +1,26 @@
+# 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.
+# ============================================================================
+"""Mock the MindSpore mindspore/train/serialization.py."""
+
+
+def save_checkpoint(trainable_weights, ckpt_file_name):
+    """
+    Mock save_checkpoint.
+
+    Args:
+        trainable_weights (list): List of weights.
+        ckpt_file_name (str): Path to save checkpoint file.
+    """
+    return len(trainable_weights), ckpt_file_name