diff --git a/mindspore/lite/tools/converter/CMakeLists.txt b/mindspore/lite/tools/converter/CMakeLists.txt
index 704b000a43c..db9990a6298 100644
--- a/mindspore/lite/tools/converter/CMakeLists.txt
+++ b/mindspore/lite/tools/converter/CMakeLists.txt
@@ -59,6 +59,9 @@ file(GLOB_RECURSE CONVERTER_SRC RELATIVE ${CMAKE_CURRENT_SOURCE_DIR}
         ../optimizer/fusion/tf_gelu_fusion.cc
         ../optimizer/fusion/onnx_gelu_fusion.cc
         ../optimizer/fusion/squeeze_fusion.cc
+        ../optimizer/fisson/fisson_util.cc
+        ../optimizer/fisson/iter_node_outputs.cc
+        ../optimizer/fisson/node_out_shapes.cc
         ../optimizer/graph/conv1d_inout_adjust_pass.cc
         ../optimizer/graph/weight_format_transform_pass.cc
         ../optimizer/graph/weight_format_hardcode_pass.cc
diff --git a/mindspore/lite/tools/optimizer/fisson/fisson_util.cc b/mindspore/lite/tools/optimizer/fisson/fisson_util.cc
new file mode 100644
index 00000000000..cef61dd7e83
--- /dev/null
+++ b/mindspore/lite/tools/optimizer/fisson/fisson_util.cc
@@ -0,0 +1,129 @@
+/**
+ * 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.
+ */
+
+#include <unordered_set>
+#include <unordered_map>
+#include <memory>
+#include "tools/optimizer/fisson/fisson_util.h"
+#include "mindspore/core/base/core_ops.h"
+#include "src/common/utils.h"
+#include "tools/common/node_util.h"
+
+namespace mindspore {
+using lite::converter::FmkType;
+
+namespace opt {
+std::unordered_map<std::string, std::vector<AnfNodePtr>> g_graph_nodes_output = {};
+std::unordered_map<std::string, std::vector<std::vector<ShapeVector>>> g_graph_nodes_out_shapes = {};
+
+AnfNodePtr CreateOutputsOfConcat(const FuncGraphPtr &func_graph, const CNodePtr &conv_cnode,
+                                 const std::vector<AnfNodePtr> &conv_outputs, const SplitInfo &split_info,
+                                 const std::string &node_name) {
+  MS_EXCEPTION_IF_NULL(func_graph);
+  MS_EXCEPTION_IF_NULL(conv_cnode);
+
+  int32_t nodes_num = conv_outputs.size();
+  if (nodes_num != split_info.out_num) {
+    MS_LOG(ERROR) << "Conv outputs has wrong input size";
+    return nullptr;
+  }
+
+  // the inputs of concate are from the outputs of conv
+  std::vector<AnfNodePtr> concate_inputs = {NewValueNode(std::make_shared<Primitive>(prim::kPrimConcat->name()))};
+  for (int32_t i = 0; i < nodes_num; i++) {
+    concate_inputs.push_back(conv_outputs[i]);
+  }
+
+  auto concate_cnode = func_graph->NewCNode(concate_inputs);
+  MS_EXCEPTION_IF_NULL(concate_cnode);
+
+  concate_cnode->set_fullname_with_scope(node_name + "_Concat");
+  concate_cnode->set_scope(conv_cnode->scope());
+
+  return concate_cnode;
+}
+
+int32_t GetCOutAxis(int32_t format) {
+  switch (format) {
+    case schema::Format_KHWC:
+      return 0;
+    case schema::Format_CHWK:
+      return 3;
+    case schema::Format_NCHW:
+      return 0;
+    default:
+      MS_LOG(ERROR) << "Do not support format: " << format << " now.";
+      return -1;
+  }
+}
+
+int32_t GetCInAxis(int32_t format) {
+  switch (format) {
+    case schema::Format_KHWC:
+      return 3;
+    case schema::Format_CHWK:
+      return 0;
+    default:
+      MS_LOG(ERROR) << "Do not support format: " << format << " now.";
+      return -1;
+  }
+}
+
+int32_t GetAxis(int32_t axis, int32_t format, const SplitInfo &split_info) {
+  switch (split_info.primitive_type) {
+    case mindspore::schema::PrimitiveType_Conv2DFusion:
+      if (axis == CuttingStragedy::CUT_C_OUT) {
+        return GetCOutAxis(format);
+      } else if (axis == CuttingStragedy::CUT_C_IN) {
+        return GetCInAxis(format);
+      } else {
+        MS_LOG(ERROR) << "Only channel_in and channel_out need to transform.";
+      }
+      break;
+    default:
+      MS_LOG(ERROR) << "Now, do not support the type : " << split_info.primitive_type;
+  }
+  return -1;
+}
+
+AnfNodePtr CreateOutputsOfAddN(const FuncGraphPtr &func_graph, const CNodePtr &conv_cnode,
+                               const std::vector<AnfNodePtr> &conv_outputs, const SplitInfo &split_info,
+                               const std::string &node_name) {
+  MS_EXCEPTION_IF_NULL(func_graph);
+  MS_EXCEPTION_IF_NULL(conv_cnode);
+
+  int32_t nodes_num = conv_outputs.size();
+  if (nodes_num != split_info.out_num) {
+    MS_LOG(ERROR) << "Conv outputs has wrong input size";
+    return nullptr;
+  }
+
+  // the inputs of addn are from the outputs of conv
+  std::vector<AnfNodePtr> addn_inputs = {NewValueNode(std::make_shared<Primitive>(prim::kPrimAddN->name()))};
+  for (int32_t i = 0; i < nodes_num; i++) {
+    addn_inputs.push_back(conv_outputs[i]);
+  }
+
+  auto addn_cnode = func_graph->NewCNode(addn_inputs);
+  MS_EXCEPTION_IF_NULL(addn_cnode);
+
+  addn_cnode->set_fullname_with_scope(node_name + "_AddN");
+  addn_cnode->set_scope(conv_cnode->scope());
+
+  return addn_cnode;
+}
+}  // namespace opt
+}  // namespace mindspore
diff --git a/mindspore/lite/tools/optimizer/fisson/fisson_util.h b/mindspore/lite/tools/optimizer/fisson/fisson_util.h
new file mode 100644
index 00000000000..ec85036df98
--- /dev/null
+++ b/mindspore/lite/tools/optimizer/fisson/fisson_util.h
@@ -0,0 +1,68 @@
+/**
+ * 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.
+ */
+
+#ifndef MINDSPORE_LITE_TOOLS_OPTIMIZER_FISSON_FISSON_UTIL_H_
+#define MINDSPORE_LITE_TOOLS_OPTIMIZER_FISSON_FISSON_UTIL_H_
+
+#include <vector>
+#include <string>
+#include <unordered_map>
+#include "schema/inner/model_generated.h"
+#include "mindspore/ccsrc/utils/utils.h"
+#include "tools/optimizer/common/gllo_utils.h"
+#include "tools/converter/converter_flags.h"
+#include "mindspore/lite/include/context.h"
+#include "mindspore/lite/include/lite_types.h"
+
+namespace mindspore {
+using mindspore::schema::PrimitiveType;
+namespace opt {
+extern std::unordered_map<std::string, std::vector<AnfNodePtr>> g_graph_nodes_output;
+extern std::unordered_map<std::string, std::vector<std::vector<ShapeVector>>> g_graph_nodes_out_shapes;
+
+struct SplitInfo {
+  int32_t axis;
+  int32_t out_num;
+  std::vector<int32_t> size_splits;
+  std::vector<int32_t> extend_top;
+  std::vector<int32_t> extend_bottom;
+  std::vector<mindspore::lite::DeviceType> dev_types;
+  int32_t in_num_conv;
+  int32_t fmk_type;
+  std::vector<int32_t> weight_channel;
+  PrimitiveType primitive_type;
+};
+
+typedef enum { CUT_N, CUT_H, CUT_W, CUT_C_IN, CUT_C_OUT, CUT_NONE } CuttingStragedy;
+
+void GetMultipleOutputsOfAnfNode(const FuncGraphPtr &func_graph, const AnfNodePtr &node, size_t output_num,
+                                 std::vector<AnfNodePtr> *outputs);
+
+AnfNodePtr CreateOutputsOfConcat(const FuncGraphPtr &func_graph, const CNodePtr &conv_cnode,
+                                 const std::vector<AnfNodePtr> &conv_outputs, const SplitInfo &split_info,
+                                 const std::string &node_name);
+void CreateOutputsOfSplitWithOverlap(const FuncGraphPtr &func_graph, const CNodePtr &conv_cnode,
+                                     std::vector<AnfNodePtr> *split_outputs, const SplitInfo &split_info,
+                                     const std::string &node_name);
+
+void GetCNodeShapeInfo(const FuncGraphPtr &func_graph, int32_t fmk_type);
+
+AnfNodePtr CreateOutputsOfAddN(const FuncGraphPtr &func_graph, const CNodePtr &conv_cnode,
+                               const std::vector<AnfNodePtr> &conv_outputs, const SplitInfo &split_info,
+                               const std::string &node_name);
+}  // namespace opt
+}  // namespace mindspore
+#endif  // MINDSPORE_LITE_TOOLS_OPTIMIZER_FISSON_FISSON_UTIL_H_
diff --git a/mindspore/lite/tools/optimizer/fisson/iter_node_outputs.cc b/mindspore/lite/tools/optimizer/fisson/iter_node_outputs.cc
new file mode 100644
index 00000000000..0df55181af4
--- /dev/null
+++ b/mindspore/lite/tools/optimizer/fisson/iter_node_outputs.cc
@@ -0,0 +1,53 @@
+/**
+ * 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.
+ */
+
+#include "tools/optimizer/fisson/iter_node_outputs.h"
+#include <vector>
+#include "tools/optimizer/fisson/fisson_util.h"
+
+namespace mindspore {
+namespace opt {
+
+AnfNodePtr IterNodeOutputs::Run(const FuncGraphPtr &func_graph, const AnfNodePtr &node) {
+  if (CheckIfFuncGraphIsNull(func_graph) != lite::RET_OK || CheckIfAnfNodeIsNull(node) != lite::RET_OK) {
+    return nullptr;
+  }
+  if (!utils::isa<CNodePtr>(node)) {
+    return nullptr;
+  }
+  auto cnode = node->cast<CNodePtr>();
+  auto inputs = cnode->inputs();
+
+  for (auto input_node : inputs) {
+    if (!utils::isa<CNodePtr>(input_node)) {
+      continue;
+    }
+    auto input_cnode = input_node->cast<CNodePtr>();
+    auto name = input_cnode->fullname_with_scope();
+    if (g_graph_nodes_output.find(name) != g_graph_nodes_output.end()) {
+      std::vector<AnfNodePtr>::iterator it;
+      it = find(g_graph_nodes_output[name].begin(), g_graph_nodes_output[name].end(), node);
+      if (it != g_graph_nodes_output[name].end()) {
+        continue;
+      }
+    }
+    g_graph_nodes_output[name].push_back(node);
+  }
+  return nullptr;
+}
+
+}  // namespace opt
+}  // namespace mindspore
diff --git a/mindspore/lite/tools/optimizer/fisson/iter_node_outputs.h b/mindspore/lite/tools/optimizer/fisson/iter_node_outputs.h
new file mode 100644
index 00000000000..fdd3cef5dd9
--- /dev/null
+++ b/mindspore/lite/tools/optimizer/fisson/iter_node_outputs.h
@@ -0,0 +1,35 @@
+/**
+ * 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.
+ */
+
+#include "ir/anf.h"
+#include "mindspore/ccsrc/backend/optimizer/common/node_pass.h"
+
+#ifndef MINDSPORE_LITE_TOOLS_OPTIMIZER_FISSON_ITER_NODE_OUTPUTS_H_
+#define MINDSPORE_LITE_TOOLS_OPTIMIZER_FISSON_ITER_NODE_OUTPUTS_H_
+
+namespace mindspore {
+namespace opt {
+class IterNodeOutputs : public opt::NodePass {
+ public:
+  IterNodeOutputs() : NodePass("iter_node_outputs") {}
+  ~IterNodeOutputs() override = default;
+  AnfNodePtr Run(const FuncGraphPtr &func_graph, const AnfNodePtr &node) override;
+};
+
+}  // namespace opt
+}  // namespace mindspore
+
+#endif  // MINDSPORE_LITE_TOOLS_OPTIMIZER_FISSON_ITER_NODE_OUTPUTS_H_
diff --git a/mindspore/lite/tools/optimizer/fisson/node_out_shapes.cc b/mindspore/lite/tools/optimizer/fisson/node_out_shapes.cc
new file mode 100644
index 00000000000..0cb2acee57e
--- /dev/null
+++ b/mindspore/lite/tools/optimizer/fisson/node_out_shapes.cc
@@ -0,0 +1,81 @@
+/**
+ * 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.
+ */
+
+#include "tools/optimizer/fisson/node_out_shapes.h"
+#include <vector>
+#include <string>
+#include "tools/optimizer/fisson/fisson_util.h"
+
+namespace mindspore {
+namespace opt {
+
+AnfNodePtr NodeOutShapes::Run(const FuncGraphPtr &func_graph, const AnfNodePtr &node) {
+  if (CheckIfFuncGraphIsNull(func_graph) != lite::RET_OK || CheckIfAnfNodeIsNull(node) != lite::RET_OK) {
+    return nullptr;
+  }
+  std::vector<ShapeVector> input_shapes;
+  std::vector<ShapeVector> output_shapes;
+  if (!utils::isa<CNodePtr>(node)) {
+    return nullptr;
+  }
+  auto cnode = node->cast<CNodePtr>();
+  // input
+  for (auto input_node : cnode->inputs()) {
+    if (utils::isa<CNodePtr>(input_node) || utils::isa<ParameterPtr>(input_node)) {
+      auto in_shape = input_node->Shape();
+      if (in_shape == nullptr) {
+        MS_LOG(ERROR) << "The shape is null.";
+        lite::ReturnCode::GetSingleReturnCode()->UpdateReturnCode(lite::RET_NULL_PTR);
+        return nullptr;
+      }
+      if (utils::isa<abstract::ShapePtr>(in_shape)) {
+        const auto &shape = in_shape->cast<abstract::ShapePtr>()->shape();
+        input_shapes.push_back(shape);
+      } else {
+        MS_LOG(ERROR) << "currently not support tuple";
+      }
+    }
+  }
+  // output
+  auto out_shape = cnode->Shape();
+  if (out_shape == nullptr) {
+    MS_LOG(ERROR) << "The shape is null.";
+    lite::ReturnCode::GetSingleReturnCode()->UpdateReturnCode(lite::RET_NULL_PTR);
+    return nullptr;
+  }
+  if (utils::isa<abstract::TupleShapePtr>(out_shape)) {
+    auto shape = out_shape->cast<abstract::TupleShapePtr>();
+    for (size_t i = 0; i < shape->size(); ++i) {
+      const auto &shape_ptr = (*shape)[i];
+      if (!utils::isa<abstract::ShapePtr>(shape_ptr)) {
+        MS_LOG(ERROR) << "shape_ptr is not ShapePtr.";
+        lite::ReturnCode::GetSingleReturnCode()->UpdateReturnCode(lite::RET_NULL_PTR);
+        return nullptr;
+      }
+      output_shapes.push_back(shape_ptr->cast<abstract::ShapePtr>()->shape());
+    }
+  } else if (utils::isa<abstract::ShapePtr>(out_shape)) {
+    const auto &shape = out_shape->cast<abstract::ShapePtr>()->shape();
+    output_shapes.push_back(shape);
+  }
+
+  std::string name = cnode->fullname_with_scope();
+  g_graph_nodes_out_shapes[name].push_back(input_shapes);
+  g_graph_nodes_out_shapes[name].push_back(output_shapes);
+  return nullptr;
+}
+}  // namespace opt
+}  // namespace mindspore
diff --git a/mindspore/lite/tools/optimizer/fisson/node_out_shapes.h b/mindspore/lite/tools/optimizer/fisson/node_out_shapes.h
new file mode 100644
index 00000000000..3c343147ad7
--- /dev/null
+++ b/mindspore/lite/tools/optimizer/fisson/node_out_shapes.h
@@ -0,0 +1,35 @@
+/**
+ * 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.
+ */
+
+#include "ir/anf.h"
+#include "mindspore/ccsrc/backend/optimizer/common/node_pass.h"
+
+#ifndef MINDSPORE_LITE_TOOLS_OPTIMIZER_FISSON_NODE_OUT_SHAPES_H_
+#define MINDSPORE_LITE_TOOLS_OPTIMIZER_FISSON_NODE_OUT_SHAPES_H_
+
+namespace mindspore {
+namespace opt {
+class NodeOutShapes : public opt::NodePass {
+ public:
+  NodeOutShapes() : NodePass("node_out_shapes") {}
+  ~NodeOutShapes() override = default;
+  AnfNodePtr Run(const FuncGraphPtr &func_graph, const AnfNodePtr &node);
+};
+
+}  // namespace opt
+}  // namespace mindspore
+
+#endif  // MINDSPORE_LITE_TOOLS_OPTIMIZER_FISSON_NODE_OUT_SHAPES_H_