diff --git a/mindspore/lite/nnacl/clip.c b/mindspore/lite/nnacl/clip.c
new file mode 100644
index 0000000000..473637ab03
--- /dev/null
+++ b/mindspore/lite/nnacl/clip.c
@@ -0,0 +1,29 @@
+/**
+ * Copyright 2020 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.
+ */
+
+#include "nnacl/clip.h"
+#include "nnacl/errorcode.h"
+
+int ClipFp32(const float *src, int length, float *dst, float min_val, float max_val) {
+  if (max_val <= min_val) {
+    return NNACL_ERR;
+  }
+  int i = 0;
+  for (; i < length; ++i) {
+    dst[i] = src[i] < min_val ? min_val : (src[i] > max_val ? max_val : src[i]);
+  }
+  return NNACL_OK;
+}
diff --git a/mindspore/lite/nnacl/clip.h b/mindspore/lite/nnacl/clip.h
new file mode 100644
index 0000000000..9e04a7b429
--- /dev/null
+++ b/mindspore/lite/nnacl/clip.h
@@ -0,0 +1,36 @@
+/**
+ * Copyright 2020 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.
+ */
+#ifndef MINDSPORE_LITE_NNACL_CLIP_H_
+#define MINDSPORE_LITE_NNACL_CLIP_H_
+
+#include <math.h>
+#include "nnacl/op_base.h"
+#include "nnacl/quantization/fixed_point.h"
+
+typedef struct ClipParameter {
+  OpParameter op_parameter_;
+  float min_val_;
+  float max_val_;
+} ClipParameter;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+int ClipFp32(const float *src, int length, float *dst, float min_val, float max_val);
+#ifdef __cplusplus
+}
+#endif
+#endif  // MINDSPORE_LITE_NNACL_CLIP_H_
diff --git a/mindspore/lite/src/ops/primitive_c.cc b/mindspore/lite/src/ops/primitive_c.cc
index 87662121f4..efb592bad5 100644
--- a/mindspore/lite/src/ops/primitive_c.cc
+++ b/mindspore/lite/src/ops/primitive_c.cc
@@ -128,6 +128,7 @@
 #include "src/ops/lsh_projection.h"
 #include "src/ops/hashtable_lookup.h"
 #include "src/ops/skip_gram.h"
+#include "src/ops/clip.h"
 #include "src/ops/custom_predict.h"
 #include "src/ops/custom_normalize.h"
 #include "src/ops/custom_extract_features.h"
@@ -692,6 +693,8 @@ PrimitiveC *PrimitiveC::Create(mindspore::schema::PrimitiveT *primitive) {
       return new HashtableLookup(primitive);
     case schema::PrimitiveType_SkipGram:
       return new SkipGram(primitive);
+    case schema::PrimitiveType_Clip:
+      return new Clip(primitive);
     case schema::PrimitiveType_CustomPredict:
       return new CustomPredict(primitive);
     case schema::PrimitiveType_CustomNormalize:
@@ -964,6 +967,8 @@ PrimitiveC *PrimitiveC::Create(const schema::Primitive *primitive) {
       return NewPrimitiveC<HashtableLookup>(primitive);
     case schema::PrimitiveType_SkipGram:
       return NewPrimitiveC<SkipGram>(primitive);
+    case schema::PrimitiveType_Clip:
+      return NewPrimitiveC<Clip>(primitive);
     case schema::PrimitiveType_CustomPredict:
       return NewPrimitiveC<CustomPredict>(primitive);
     case schema::PrimitiveType_CustomNormalize:
diff --git a/mindspore/lite/src/populate_parameter.cc b/mindspore/lite/src/populate_parameter.cc
index 59983c1974..2eae2c6c0c 100644
--- a/mindspore/lite/src/populate_parameter.cc
+++ b/mindspore/lite/src/populate_parameter.cc
@@ -59,6 +59,7 @@
 #include "src/ops/argmax.h"
 #include "src/ops/argmin.h"
 #include "src/ops/cast.h"
+#include "src/ops/clip.h"
 #include "src/ops/reshape.h"
 #include "src/ops/scale.h"
 #include "src/ops/concat.h"
@@ -139,6 +140,7 @@
 #include "nnacl/fp32/topk.h"
 #include "nnacl/reduce_parameter.h"
 #include "nnacl/fp32/activation.h"
+#include "nnacl/clip.h"
 #include "nnacl/fp32/arithmetic.h"
 #include "nnacl/fp32/batchnorm.h"
 #include "nnacl/power.h"
@@ -624,6 +626,20 @@ OpParameter *PopulateActivationParameter(const mindspore::lite::PrimitiveC *prim
   return reinterpret_cast<OpParameter *>(act_param);
 }
 
+OpParameter *PopulateClipParameter(const mindspore::lite::PrimitiveC *primitive) {
+  ClipParameter *act_param = reinterpret_cast<ClipParameter *>(malloc(sizeof(ClipParameter)));
+  if (act_param == nullptr) {
+    MS_LOG(ERROR) << "malloc ClipParameter failed.";
+    return nullptr;
+  }
+  memset(act_param, 0, sizeof(ClipParameter));
+  act_param->op_parameter_.type_ = primitive->Type();
+  auto activation = reinterpret_cast<mindspore::lite::Clip *>(const_cast<mindspore::lite::PrimitiveC *>(primitive));
+  act_param->min_val_ = activation->GetMin();
+  act_param->max_val_ = activation->GetMax();
+  return reinterpret_cast<OpParameter *>(act_param);
+}
+
 OpParameter *PopulateFusedBatchNorm(const mindspore::lite::PrimitiveC *primitive) {
   BatchNormParameter *batch_norm_param = reinterpret_cast<BatchNormParameter *>(malloc(sizeof(BatchNormParameter)));
   if (batch_norm_param == nullptr) {
@@ -1645,6 +1661,7 @@ PopulateParameterRegistry::PopulateParameterRegistry() {
   populate_parameter_funcs_[schema::PrimitiveType_SparseToDense] = PopulateSparseToDenseParameter;
   populate_parameter_funcs_[schema::PrimitiveType_SoftMax] = PopulateSoftmaxParameter;
   populate_parameter_funcs_[schema::PrimitiveType_Activation] = PopulateActivationParameter;
+  populate_parameter_funcs_[schema::PrimitiveType_Clip] = PopulateClipParameter;
   populate_parameter_funcs_[schema::PrimitiveType_Conv2D] = PopulateConvParameter;
   populate_parameter_funcs_[schema::PrimitiveType_Reduce] = PopulateReduceParameter;
   populate_parameter_funcs_[schema::PrimitiveType_Mean] = PopulateMeanParameter;
diff --git a/mindspore/lite/test/CMakeLists.txt b/mindspore/lite/test/CMakeLists.txt
index f8bb8555bd..863f61e862 100644
--- a/mindspore/lite/test/CMakeLists.txt
+++ b/mindspore/lite/test/CMakeLists.txt
@@ -185,6 +185,7 @@ if(ENABLE_CONVERTER)
             ${LITE_DIR}/tools/optimizer/fusion/quant_dtype_cast_fusion.cc
             ${LITE_DIR}/tools/optimizer/graph/weight_format_transform_pass.cc
             ${LITE_DIR}/tools/optimizer/graph/weight_format_hardcode_pass.cc
+            ${LITE_DIR}/tools/optimizer/graph/clip_convert_activation_pass.cc
             ${LITE_DIR}/tools/optimizer/graph/unused_cast_node_remove_pass.cc
             )
 endif()
diff --git a/mindspore/lite/tools/anf_importer/import_from_meta_graphT.cc b/mindspore/lite/tools/anf_importer/import_from_meta_graphT.cc
index 4322071095..bb40b536ea 100644
--- a/mindspore/lite/tools/anf_importer/import_from_meta_graphT.cc
+++ b/mindspore/lite/tools/anf_importer/import_from_meta_graphT.cc
@@ -14,12 +14,12 @@
  * limitations under the License.
  */
 
+#include "tools/anf_importer/import_from_meta_graphT.h"
 #include <vector>
 #include <algorithm>
 #include "schema/inner/model_generated.h"
 #include "frontend/operator/ops.h"
 #include "src/param_value_lite.h"
-#include "tools/anf_importer/import_from_meta_graphT.h"
 #include "src/common/log_adapter.h"
 #include "include/errorcode.h"
 #include "tools/common/tensor_util.h"
diff --git a/mindspore/lite/tools/converter/CMakeLists.txt b/mindspore/lite/tools/converter/CMakeLists.txt
index faddfef30a..c61e23b38a 100644
--- a/mindspore/lite/tools/converter/CMakeLists.txt
+++ b/mindspore/lite/tools/converter/CMakeLists.txt
@@ -62,6 +62,7 @@ file(GLOB_RECURSE CONVERTER_SRC RELATIVE ${CMAKE_CURRENT_SOURCE_DIR}
         ../optimizer/fusion/quant_dtype_cast_fusion.cc
         ../optimizer/graph/weight_format_transform_pass.cc
         ../optimizer/graph/weight_format_hardcode_pass.cc
+        ../optimizer/graph/clip_convert_activation_pass.cc
         ../optimizer/graph/unused_cast_node_remove_pass.cc
         )
 
diff --git a/mindspore/lite/tools/converter/anf_transform.cc b/mindspore/lite/tools/converter/anf_transform.cc
index 1438a90468..487b514730 100644
--- a/mindspore/lite/tools/converter/anf_transform.cc
+++ b/mindspore/lite/tools/converter/anf_transform.cc
@@ -27,6 +27,7 @@
 #include "tools/optimizer/fusion/quant_dtype_cast_fusion.h"
 #include "tools/optimizer/graph/weight_format_hardcode_pass.h"
 #include "tools/optimizer/graph/weight_format_transform_pass.h"
+#include "tools/optimizer/graph/clip_convert_activation_pass.h"
 #include "tools/optimizer/graph/unused_cast_node_remove_pass.h"
 #include "tools/converter/quantizer/post_training_quantizer.h"
 #include "tools/converter/quantizer/quant_cast.h"
@@ -45,6 +46,7 @@ FuncGraphPtr AnfTransform::Transform(const FuncGraphPtr &old_graph, const conver
   auto optimizer = std::make_shared<opt::GraphOptimizer>();
   auto pm = std::make_shared<opt::PassManager>("anf fusion pass manager", false);
   auto graph_pm = std::make_shared<opt::PassManager>("anf graph pass manager", true);
+  auto convert_pm = std::make_shared<opt::PassManager>("anf graph convert pass manager", true);
 
   // for now - trainning is not supporting fuse operations
   if (config != nullptr && config->trainModel == false) {
@@ -79,6 +81,8 @@ FuncGraphPtr AnfTransform::Transform(const FuncGraphPtr &old_graph, const conver
     pm->AddPass(remove_unused_cast_pass);
   }
   pm->AddPass(std::make_shared<opt::ConstFoldPass>());
+  convert_pm->AddPass(std::make_shared<opt::ClipConvertActivationPass>());
+  optimizer->AddPassManager(convert_pm);
   optimizer->AddPassManager(pm);
   optimizer->AddPassManager(graph_pm);
   auto new_graph = optimizer->Optimize(old_graph);
diff --git a/mindspore/lite/tools/converter/graphdef_transform.cc b/mindspore/lite/tools/converter/graphdef_transform.cc
index 9a6b0d4451..1ff58281a6 100644
--- a/mindspore/lite/tools/converter/graphdef_transform.cc
+++ b/mindspore/lite/tools/converter/graphdef_transform.cc
@@ -32,6 +32,7 @@
 #include "tools/converter/legacy_optimizer/graph/trans_format_insert_pass.h"
 #include "tools/converter/legacy_optimizer/graph/isolated_node_remove_pass.h"
 #include "tools/converter/legacy_optimizer/graph/unused_node_remove_pass.h"
+#include "tools/converter/legacy_optimizer/graph/dropout_node_remove_pass.h"
 #include "tools/converter/legacy_optimizer/graph/topological_sort_pass.h"
 #include "tools/converter/quantizer/aware_quantizer.h"
 
@@ -62,6 +63,7 @@ int GraphDefTransform::Transform(const converter::Flags &ctx) {
   {
     Optimizer unusedOpRemoveOptimizer;
     unusedOpRemoveOptimizer.AddPass(new UnusedNodeRemovePass());
+    unusedOpRemoveOptimizer.AddPass(new DropoutNodeRemovePass());
     unusedOpRemoveOptimizer.AddPass(new IsolatedNodeRemovePass());
     status = unusedOpRemoveOptimizer.Run(graphDefT);
     if (status != RET_OK && status != RET_NO_CHANGE) {
diff --git a/mindspore/lite/tools/converter/legacy_optimizer/fusion/format_trans_transpose_fusion_pass.cc b/mindspore/lite/tools/converter/legacy_optimizer/fusion/format_trans_transpose_fusion_pass.cc
index 1315f83d4c..f4ec0bb792 100644
--- a/mindspore/lite/tools/converter/legacy_optimizer/fusion/format_trans_transpose_fusion_pass.cc
+++ b/mindspore/lite/tools/converter/legacy_optimizer/fusion/format_trans_transpose_fusion_pass.cc
@@ -118,6 +118,17 @@ STATUS FormatTransPermuteFusionPass::DoFusion(schema::MetaGraphT *graph, const s
   std::vector<int32_t> nhwc2nchwPerm = {0, 3, 1, 2};
   if ((perm == nchw2nhwcPerm && formatTransType == PrimitiveType_Nhwc2Nchw) ||
       (perm == nhwc2nchwPerm && formatTransType == PrimitiveType_Nchw2Nhwc)) {
+    if (formatTransPath->nodeIdx < transposePath->nodeIdx) {
+      if (graph->allTensors.at(formatTransNode->inputIndex[0])->format !=
+          graph->allTensors.at(transposeNode->outputIndex[0])->format) {
+        return RET_OK;
+      }
+    } else {
+      if (graph->allTensors.at(transposeNode->inputIndex[0])->format !=
+          graph->allTensors.at(formatTransNode->outputIndex[0])->format) {
+        return RET_OK;
+      }
+    }
     auto status = IsolateOneWayNode(graph, formatTransPath->nodeIdx);
     if (status != RET_OK) {
       MS_LOG(ERROR) << "IsolateOneWayNode failed, node: " << formatTransNode->name << ", error: " << status;
diff --git a/mindspore/lite/tools/converter/legacy_optimizer/graph/CMakeLists.txt b/mindspore/lite/tools/converter/legacy_optimizer/graph/CMakeLists.txt
index 68f4f1d782..b5a2895590 100755
--- a/mindspore/lite/tools/converter/legacy_optimizer/graph/CMakeLists.txt
+++ b/mindspore/lite/tools/converter/legacy_optimizer/graph/CMakeLists.txt
@@ -6,6 +6,7 @@ file(GLOB GRAPH_PASS
         ${CMAKE_CURRENT_SOURCE_DIR}/model_input_format_preprocess_pass.cc
         ${CMAKE_CURRENT_SOURCE_DIR}/topological_sort_pass.cc
         ${CMAKE_CURRENT_SOURCE_DIR}/unused_node_remove_pass.cc
+        ${CMAKE_CURRENT_SOURCE_DIR}/dropout_node_remove_pass.cc
         ${CMAKE_CURRENT_SOURCE_DIR}/batchnorm_convert_scale_pass.cc
         ${CMAKE_CURRENT_SOURCE_DIR}/trans_format_remove_pass.cc
         ${CMAKE_CURRENT_SOURCE_DIR}/infershape_pass.cc
diff --git a/mindspore/lite/tools/converter/legacy_optimizer/graph/dropout_node_remove_pass.cc b/mindspore/lite/tools/converter/legacy_optimizer/graph/dropout_node_remove_pass.cc
new file mode 100644
index 0000000000..6b6ec109b7
--- /dev/null
+++ b/mindspore/lite/tools/converter/legacy_optimizer/graph/dropout_node_remove_pass.cc
@@ -0,0 +1,119 @@
+/**
+ * Copyright 2020 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.
+ */
+
+#include "tools/converter/legacy_optimizer/graph/dropout_node_remove_pass.h"
+#include <queue>
+#include "src/common/log_adapter.h"
+#include "tools/common/graph_util.h"
+#include "include/errorcode.h"
+#include "schema/inner/model_generated.h"
+
+namespace mindspore {
+namespace lite {
+
+STATUS IsolateDropoutNode(schema::MetaGraphT *graphT, size_t nodeIdx) {
+  MS_ASSERT(graphT != nullptr);
+  if (graphT->nodes.size() <= nodeIdx) {
+    MS_LOG(ERROR) << "nodeIdx out of range: " << nodeIdx;
+    return RET_PARAM_INVALID;
+  }
+
+  CNodeT *node = graphT->nodes.at(nodeIdx).get();
+  auto inputTensorIdxes = node->inputIndex;
+  auto outputTensorIdxes = node->outputIndex;
+  auto preNodeIdxes = GetInputNodeIdx(*graphT, nodeIdx);
+  if (preNodeIdxes.size() > 1 || outputTensorIdxes.size() > 2) {
+    MS_LOG(ERROR) << "Only support node who has no more than one input and two output";
+    return RET_ERROR;
+  }
+  if (inputTensorIdxes.empty()) {
+    MS_LOG(ERROR) << "Error, " << nodeIdx << "th node has no input tensor";
+    return RET_ERROR;
+  }
+  if (outputTensorIdxes.size() == 2) {
+    auto outDataTensorIdx = outputTensorIdxes.at(1);
+    auto &gOutTensorIdx = graphT->outputIndex;
+    for (auto iter = gOutTensorIdx.begin(); iter != gOutTensorIdx.end(); iter++) {
+      if (*iter == outDataTensorIdx) {
+        MS_LOG(ERROR) << "Unsupported Dropout: " << node->name.c_str() << " with mask output.";
+        return RET_ERROR;
+      }
+    }
+    auto postNodeIdxes = GetOutputNodeIdx(*graphT, nodeIdx, 1);
+    if (postNodeIdxes.size() != 0) {
+      MS_LOG(ERROR) << "Unsupported Dropout: " << node->name.c_str() << " with mask output.";
+      return RET_ERROR;
+    }
+  }
+  auto inDataTensorIdx = inputTensorIdxes.front();
+  if (!outputTensorIdxes.empty()) {
+    auto outDataTensorIdx = outputTensorIdxes.front();
+    MS_ASSERT(graphT->allTensors.size() > inDataTensorIdx);
+    MS_ASSERT(graphT->allTensors.at(inDataTensorIdx) != nullptr);
+    auto &gOutTensorIdx = graphT->outputIndex;
+    for (auto iter = gOutTensorIdx.begin(); iter != gOutTensorIdx.end(); iter++) {
+      if (*iter == outDataTensorIdx) {
+        *iter = inDataTensorIdx;
+        break;
+      }
+    }
+    // find poseNode
+    auto postNodeIdxes = GetOutputNodeIdx(*graphT, nodeIdx, 0);
+    for (auto postNodeIdx : postNodeIdxes) {
+      MS_ASSERT(graphT->nodes.size() > postNodeIdx);
+      auto &postNode = graphT->nodes.at(postNodeIdx);
+      MS_ASSERT(postNode != nullptr);
+      for (auto iter = postNode->inputIndex.begin(); iter != postNode->inputIndex.end(); iter++) {
+        if (*iter == outDataTensorIdx) {
+          *iter = inDataTensorIdx;
+          break;
+        }
+      }
+    }
+  }
+
+  // now all node's outputTensors are useless
+  // remove all node's outputTensors
+  auto status = RemoveTensor(graphT, outputTensorIdxes);
+  if (status != RET_OK) {
+    MS_LOG(ERROR) << "RemoveOutputTensors of node " << node->name.c_str() << "failed";
+    return RET_ERROR;
+  }
+
+  node->inputIndex.clear();
+  node->outputIndex.clear();
+  return RET_OK;
+}
+
+STATUS DropoutNodeRemovePass::Run(schema::MetaGraphT *graph) {
+  MS_ASSERT(graph != nullptr);
+  bool ifChanged = false;
+  for (size_t i = 0; i < graph->nodes.size(); i++) {
+    auto &node = graph->nodes.at(i);
+    if (node->primitive->value.type == schema::PrimitiveType_Dropout) {
+      ifChanged = true;
+      auto status = IsolateDropoutNode(graph, i);
+      if (status != RET_OK) {
+        MS_LOG(ERROR) << "IsolateDropoutNode failed, subGraph: " << graph->name << ", node: " << node->name
+                      << ", error: " << status;
+        return status;
+      }
+    }
+  }
+  return ifChanged ? RET_OK : RET_NO_CHANGE;
+}
+}  // namespace lite
+}  // namespace mindspore
diff --git a/mindspore/lite/tools/converter/legacy_optimizer/graph/dropout_node_remove_pass.h b/mindspore/lite/tools/converter/legacy_optimizer/graph/dropout_node_remove_pass.h
new file mode 100644
index 0000000000..1006951070
--- /dev/null
+++ b/mindspore/lite/tools/converter/legacy_optimizer/graph/dropout_node_remove_pass.h
@@ -0,0 +1,36 @@
+/**
+ * Copyright 2020 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.
+ */
+
+#ifndef MINDSPORE_LITE_TOOLS_CONVERTER_LEGACY_OPTIMIZER_GRAGP_DROPOUT_NODE_REMOVE_PASS_H_
+#define MINDSPORE_LITE_TOOLS_CONVERTER_LEGACY_OPTIMIZER_GRAGP_DROPOUT_NODE_REMOVE_PASS_H_
+
+#include <unordered_map>
+#include "tools/converter/optimizer.h"
+
+namespace mindspore {
+namespace lite {
+class DropoutNodeRemovePass : public GraphPass {
+ public:
+  DropoutNodeRemovePass() = default;
+
+  ~DropoutNodeRemovePass() override = default;
+
+  STATUS Run(schema::MetaGraphT *graph) override;
+};
+}  // namespace lite
+}  // namespace mindspore
+
+#endif  // MINDSPORE_LITE_TOOLS_CONVERTER_LEGACY_OPTIMIZER_GRAGP_DROPOUT_NODE_REMOVE_PASS_H_
diff --git a/mindspore/lite/tools/converter/legacy_optimizer/graph/unused_node_remove_pass.h b/mindspore/lite/tools/converter/legacy_optimizer/graph/unused_node_remove_pass.h
index 3539568b3a..647ea39e49 100644
--- a/mindspore/lite/tools/converter/legacy_optimizer/graph/unused_node_remove_pass.h
+++ b/mindspore/lite/tools/converter/legacy_optimizer/graph/unused_node_remove_pass.h
@@ -14,8 +14,8 @@
  * limitations under the License.
  */
 
-#ifndef MINDSPORE_PREDICT_UNUSED_NODE_REMOVE_PASS_H
-#define MINDSPORE_PREDICT_UNUSED_NODE_REMOVE_PASS_H
+#ifndef MINDSPORE_LITE_TOOLS_CONVERTER_LEGACY_OPTIMIZER_GRAGP_UNUSED_NODE_REMOVE_PASS_H
+#define MINDSPORE_LITE_TOOLS_CONVERTER_LEGACY_OPTIMIZER_GRAGP_UNUSED_NODE_REMOVE_PASS_H
 
 #include <unordered_map>
 #include "tools/converter/optimizer.h"
@@ -33,4 +33,4 @@ class UnusedNodeRemovePass : public GraphPass {
 }  // namespace lite
 }  // namespace mindspore
 
-#endif  // MINDSPORE_PREDICT_UNUSED_NODE_REMOVE_PASS_H
+#endif  // MINDSPORE_LITE_TOOLS_CONVERTER_LEGACY_OPTIMIZER_GRAGP_UNUSED_NODE_REMOVE_PASS_H
diff --git a/mindspore/lite/tools/converter/parser/onnx/onnx_clip_parser.cc b/mindspore/lite/tools/converter/parser/onnx/onnx_clip_parser.cc
index 398b5af837..ef1cea6e55 100644
--- a/mindspore/lite/tools/converter/parser/onnx/onnx_clip_parser.cc
+++ b/mindspore/lite/tools/converter/parser/onnx/onnx_clip_parser.cc
@@ -40,26 +40,17 @@ STATUS OnnxClipParser::Parse(const onnx::GraphProto &onnx_graph, const onnx::Nod
       min = onnx_node_attr.f();
     }
   }
-  if (min == 0 && max == 6) {
-    std::unique_ptr<schema::ActivationT> attr = std::make_unique<schema::ActivationT>();
-    if (attr == nullptr) {
-      MS_LOG(ERROR) << "new op failed";
-      return RET_NULL_PTR;
-    }
-    attr->type = schema::ActivationType_RELU6;
-    op->primitive->value.type = schema::PrimitiveType_Activation;
-    op->primitive->value.value = attr.release();
-  } else {
-    std::unique_ptr<schema::ClipT> attr = std::make_unique<schema::ClipT>();
-    if (attr == nullptr) {
-      MS_LOG(ERROR) << "new op failed";
-      return RET_NULL_PTR;
-    }
-    attr->max = max;
-    attr->min = min;
-    op->primitive->value.type = schema::PrimitiveType_Clip;
-    op->primitive->value.value = attr.release();
+
+  std::unique_ptr<schema::ClipT> attr = std::make_unique<schema::ClipT>();
+  if (attr == nullptr) {
+    MS_LOG(ERROR) << "new op failed";
+    return RET_NULL_PTR;
   }
+  attr->max = max;
+  attr->min = min;
+  op->primitive->value.type = schema::PrimitiveType_Clip;
+  op->primitive->value.value = attr.release();
+
   return RET_OK;
 }
 
diff --git a/mindspore/lite/tools/optimizer/graph/clip_convert_activation_pass.cc b/mindspore/lite/tools/optimizer/graph/clip_convert_activation_pass.cc
new file mode 100644
index 0000000000..786710ab30
--- /dev/null
+++ b/mindspore/lite/tools/optimizer/graph/clip_convert_activation_pass.cc
@@ -0,0 +1,94 @@
+/**
+ * Copyright 2020 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.
+ */
+#include "tools/optimizer/graph/clip_convert_activation_pass.h"
+#include <vector>
+#include <memory>
+#include "tools/optimizer/common/gllo_utils.h"
+#include "src/ops/primitive_c.h"
+#include "schema/inner/model_generated.h"
+#include "src/tensor.h"
+#include "tools/converter/quantizer/quant_cast.h"
+#include "src/common/log_adapter.h"
+#include "securec/include/securec.h"
+
+using mindspore::lite::PrimitiveC;
+namespace mindspore::opt {
+namespace {
+constexpr size_t kClipMinIndex = 2;
+constexpr size_t kClipMaxIndex = 3;
+}  // namespace
+
+bool ClipConvertActivationPass::Run(const FuncGraphPtr &graph) {
+  MS_ASSERT(graph != nullptr);
+  auto node_list = TopoSort(graph->get_return());
+  for (auto &node : node_list) {
+    if (!utils::isa<CNode>(node)) {
+      continue;
+    }
+    if (opt::GetCNodeType(node) != schema::PrimitiveType_Clip) {
+      continue;
+    }
+    auto clip_cnode = node->cast<CNodePtr>();
+    MS_ASSERT(clip_cnode->inputs().size() > kClipMinIndex);
+    MS_ASSERT(clip_cnode->inputs().size() > kClipMaxIndex);
+
+    auto primitive_c = GetValueNode<std::shared_ptr<PrimitiveC>>(clip_cnode->input(0));
+    auto primT = primitive_c->GetPrimitiveT();
+    float max = primT->value.AsClip()->max;
+    float min = primT->value.AsClip()->min;
+    if ((min == -1) && (max == -1)) {
+      if (clip_cnode->size() != 4) {
+        MS_LOG(ERROR) << "Clip param invalid";
+        return false;
+      }
+      auto min_param_value = GetLiteParamValue(clip_cnode->input(kClipMinIndex));
+      auto max_param_value = GetLiteParamValue(clip_cnode->input(kClipMaxIndex));
+      if ((min_param_value->tensor_type() != mindspore::kNumberTypeFloat32) ||
+          (max_param_value->tensor_type() != mindspore::kNumberTypeFloat32)) {
+        MS_LOG(ERROR) << "Clip param type invalid";
+        return false;
+      }
+      min = *reinterpret_cast<float *>(min_param_value->tensor_addr());
+      max = *reinterpret_cast<float *>(max_param_value->tensor_addr());
+    }
+    auto manager = graph->manager();
+
+    // relu node
+    auto primitive = std::make_unique<schema::PrimitiveT>();
+    MS_ASSERT(primitive != nullptr);
+    primitive->value.type = schema::PrimitiveType_Activation;
+    auto prim2 = new schema::ActivationT;
+    MS_ASSERT(prim2 != nullptr);
+    if (min == 0 && max == 6) {
+      prim2->type = schema::ActivationType_RELU6;
+    } else {
+      prim2->type = schema::ActivationType_HARD_TANH;
+      prim2->min_val = min;
+      prim2->max_val = max;
+    }
+    primitive->value.value = prim2;
+    auto primitiveCValue = PrimitiveC::Create(primitive.release());
+    MS_ASSERT(primitiveCValue != nullptr);
+    auto value_node = NewValueNode(std::shared_ptr<PrimitiveC>(primitiveCValue));
+    std::vector<AnfNodePtr> op_inputs = {value_node};
+    op_inputs.push_back(clip_cnode->input(1));
+    auto new_cnode = graph->NewCNode(op_inputs);
+    new_cnode->set_fullname_with_scope(node->fullname_with_scope());
+    manager->Replace(node, new_cnode);
+  }
+  return false;
+}
+}  // namespace mindspore::opt
diff --git a/mindspore/lite/tools/optimizer/graph/clip_convert_activation_pass.h b/mindspore/lite/tools/optimizer/graph/clip_convert_activation_pass.h
new file mode 100644
index 0000000000..3886743ac5
--- /dev/null
+++ b/mindspore/lite/tools/optimizer/graph/clip_convert_activation_pass.h
@@ -0,0 +1,37 @@
+/**
+ * Copyright 2020 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.
+ */
+
+#ifndef MINDSPORE_LITE_TOOLS_OPTIMIZER_GRAPH_CLIP_CONVERT_ACTIVATION_PASS_H_
+#define MINDSPORE_LITE_TOOLS_OPTIMIZER_GRAPH_CLIP_CONVERT_ACTIVATION_PASS_H_
+#include <string>
+#include "schema/inner/model_generated.h"
+#include "tools/converter/converter_flags.h"
+#include "backend/optimizer/common/pass.h"
+#include "src/param_value_lite.h"
+
+using mindspore::lite::converter::FmkType;
+using mindspore::schema::QuantType;
+namespace mindspore::opt {
+class ClipConvertActivationPass : public Pass {
+ public:
+  ClipConvertActivationPass() : Pass("clip_convert_activation_pass") {}
+  ~ClipConvertActivationPass() override = default;
+  // void SetQuantType(QuantType type);
+  // void SetFmkType(FmkType fmkType);
+  bool Run(const FuncGraphPtr &graph) override;
+};
+}  // namespace mindspore::opt
+#endif  // MINDSPORE_LITE_TOOLS_OPTIMIZER_GRAPH_CLIP_CONVERT_ACTIVATION_PASS_H_
diff --git a/mindspore/lite/tools/optimizer/graph/weight_format_hardcode_pass.h b/mindspore/lite/tools/optimizer/graph/weight_format_hardcode_pass.h
index f9d698dd7e..16ab442b1f 100644
--- a/mindspore/lite/tools/optimizer/graph/weight_format_hardcode_pass.h
+++ b/mindspore/lite/tools/optimizer/graph/weight_format_hardcode_pass.h
@@ -14,8 +14,8 @@
  * limitations under the License.
  */
 
-#ifndef MINDSPORE_LITE_SRC_PASS_GRAPH_WEIGHT_FORMAT_HARDCODE_PASS_H_
-#define MINDSPORE_LITE_SRC_PASS_GRAPH_WEIGHT_FORMAT_HARDCODE_PASS_H_
+#ifndef MINDSPORE_LITE_TOOLS_OPTIMIZER_GRAPH_WEIGHT_FORMAT_HARDCODE_PASS_H_
+#define MINDSPORE_LITE_TOOLS_OPTIMIZER_GRAPH_WEIGHT_FORMAT_HARDCODE_PASS_H_
 #include <string>
 #include "schema/inner/model_generated.h"
 #include "tools/converter/converter_flags.h"
@@ -44,4 +44,4 @@ class WeightFormatHardCodePass : public Pass {
   FmkType fmk_type = lite::converter::FmkType_TF;
 };
 }  // namespace mindspore::opt
-#endif  // MINDSPORE_LITE_SRC_PASS_GRAPH_WEIGHT_FORMAT_HARDCODE_PASS_H_
+#endif  // MINDSPORE_LITE_TOOLS_OPTIMIZER_GRAPH_WEIGHT_FORMAT_HARDCODE_PASS_H_