diff --git a/src/common/types.cpp b/src/common/types.cpp
index 2a8b8c8a151e58d13093c99c753cc47e8eef64a3..8c8de7765161e61dc75036a87a34fc6abd2df43e 100644
--- a/src/common/types.cpp
+++ b/src/common/types.cpp
@@ -22,6 +22,7 @@ const char *G_OP_TYPE_BATCHNORM = "batch_norm";
 const char *G_OP_TYPE_BOX_CODER = "box_coder";
 const char *G_OP_TYPE_CONCAT = "concat";
 const char *G_OP_TYPE_ELEMENTWISE_ADD = "elementwise_add";
+const char *G_OP_TYPE_FILL_CONSTANT = "fill_constant";
 const char *G_OP_TYPE_FUSION_CONV_ADD_RELU = "fusion_conv_add_relu";
 const char *G_OP_TYPE_FUSION_CONV_ADD_PRELU = "fusion_conv_add_prelu";
 const char *G_OP_TYPE_FUSION_CONV_ADD_ADD_PRELU = "fusion_conv_add_add_prelu";
@@ -99,6 +100,7 @@ std::unordered_map<
         {G_OP_TYPE_FC, {{"X", "Y", "Z"}, {"Out"}}},
         {G_OP_TYPE_RESHAPE, {{"X"}, {"Out"}}},
         {G_OP_TYPE_DEPTHWISE_CONV, {{"Input"}, {"Output"}}},
+        {G_OP_TYPE_FILL_CONSTANT, {{}, {"Out"}}},
         {G_OP_TYPE_FUSION_CONV_ADD_RELU, {{"Input"}, {"Out"}}},
         {G_OP_TYPE_FUSION_CONV_ADD_PRELU, {{"Input"}, {"Out"}}},
         {G_OP_TYPE_FUSION_CONV_ADD_ADD_PRELU, {{"Input"}, {"Out"}}},
diff --git a/src/framework/data_type.cpp b/src/framework/data_type.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..0bcf7d9f67dae28db5a316476778b4132b39b274
--- /dev/null
+++ b/src/framework/data_type.cpp
@@ -0,0 +1,107 @@
+/* Copyright (c) 2018 PaddlePaddle Authors. 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.
+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 "framework/data_type.h"
+#include <stdint.h>
+#include <string>
+#include <unordered_map>
+
+namespace paddle_mobile {
+namespace framework {
+
+struct DataTypeMap {
+  std::unordered_map<std::type_index,
+                     _PaddleMobile__Framework__Proto__VarType__Type>
+      cpp_to_proto_;
+  std::unordered_map<int, std::type_index> proto_to_cpp_;
+  std::unordered_map<int, std::string> proto_to_str_;
+  std::unordered_map<std::type_index, size_t> cpp_to_size_;
+};
+
+static DataTypeMap* InitDataTypeMap();
+// C++11 removes the need for manual locking. Concurrent execution shall wait if
+// a static local variable is already being initialized.
+// https://stackoverflow.com/questions/11711920/how-to-implement-multithread-safe-singleton-in-c11-without-using-mutex
+static DataTypeMap& gDataTypeMap() {
+  static DataTypeMap* g_data_type_map_ = InitDataTypeMap();
+  return *g_data_type_map_;
+}
+
+template <typename T>
+static inline void RegisterType(
+    DataTypeMap* map, _PaddleMobile__Framework__Proto__VarType__Type proto_type,
+    const std::string& name) {
+  map->proto_to_cpp_.emplace(static_cast<int>(proto_type), typeid(T));
+  map->cpp_to_proto_.emplace(typeid(T), proto_type);
+  map->proto_to_str_.emplace(static_cast<int>(proto_type), name);
+  map->cpp_to_size_.emplace(typeid(T), sizeof(T));
+}
+
+static DataTypeMap* InitDataTypeMap() {
+  auto retv = new DataTypeMap();
+
+#define RegType(cc_type, proto_type) \
+  RegisterType<cc_type>(retv, proto_type, #cc_type)
+
+  // NOTE: Add your customize type here.
+  // RegType(float16, PADDLE_MOBILE__FRAMEWORK__PROTO__VAR_TYPE__TYPE__FP16);
+  RegType(float, PADDLE_MOBILE__FRAMEWORK__PROTO__VAR_TYPE__TYPE__FP32);
+  RegType(double, PADDLE_MOBILE__FRAMEWORK__PROTO__VAR_TYPE__TYPE__FP64);
+  RegType(int, PADDLE_MOBILE__FRAMEWORK__PROTO__VAR_TYPE__TYPE__INT32);
+  RegType(int64_t, PADDLE_MOBILE__FRAMEWORK__PROTO__VAR_TYPE__TYPE__INT64);
+  RegType(bool, PADDLE_MOBILE__FRAMEWORK__PROTO__VAR_TYPE__TYPE__BOOL);
+  RegType(size_t, PADDLE_MOBILE__FRAMEWORK__PROTO__VAR_TYPE__TYPE__SIZE_T);
+  RegType(int16_t, PADDLE_MOBILE__FRAMEWORK__PROTO__VAR_TYPE__TYPE__INT16);
+  RegType(uint8_t, PADDLE_MOBILE__FRAMEWORK__PROTO__VAR_TYPE__TYPE__UINT8);
+  RegType(int8_t, PADDLE_MOBILE__FRAMEWORK__PROTO__VAR_TYPE__TYPE__INT8);
+
+#undef RegType
+  return retv;
+}
+
+_PaddleMobile__Framework__Proto__VarType__Type ToDataType(
+    std::type_index type) {
+  auto it = gDataTypeMap().cpp_to_proto_.find(type);
+  if (it != gDataTypeMap().cpp_to_proto_.end()) {
+    return it->second;
+  }
+  PADDLE_MOBILE_THROW_EXCEPTION("Not support %s as tensor type", type.name());
+}
+
+std::type_index ToTypeIndex(
+    _PaddleMobile__Framework__Proto__VarType__Type type) {
+  auto it = gDataTypeMap().proto_to_cpp_.find(static_cast<int>(type));
+  if (it != gDataTypeMap().proto_to_cpp_.end()) {
+    return it->second;
+  }
+  PADDLE_MOBILE_THROW_EXCEPTION(
+      "Not support _PaddleMobile__Framework__Proto__VarType__Type(%d) as "
+      "tensor type",
+      static_cast<int>(type));
+}
+
+std::string DataTypeToString(
+    const _PaddleMobile__Framework__Proto__VarType__Type type) {
+  auto it = gDataTypeMap().proto_to_str_.find(static_cast<int>(type));
+  if (it != gDataTypeMap().proto_to_str_.end()) {
+    return it->second;
+  }
+  PADDLE_MOBILE_THROW_EXCEPTION(
+      "Not support _PaddleMobile__Framework__Proto__VarType__Type(%d) as "
+      "tensor type",
+      static_cast<int>(type));
+}
+
+}  // namespace framework
+}  // namespace paddle_mobile
diff --git a/src/framework/data_type.h b/src/framework/data_type.h
new file mode 100644
index 0000000000000000000000000000000000000000..2e3623fdedcb527cb0c85bbb7a2eaf04d91a2193
--- /dev/null
+++ b/src/framework/data_type.h
@@ -0,0 +1,77 @@
+/* Copyright (c) 2018 PaddlePaddle Authors. 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.
+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. */
+
+#pragma once
+
+#include <string>
+#include <typeindex>
+#include "common/enforce.h"
+#include "framework/framework.pb-c.h"
+
+namespace paddle_mobile {
+
+namespace framework {
+
+extern _PaddleMobile__Framework__Proto__VarType__Type ToDataType(
+    std::type_index type);
+extern std::type_index ToTypeIndex(
+    _PaddleMobile__Framework__Proto__VarType__Type type);
+
+template <typename Visitor>
+inline void VisitDataType(_PaddleMobile__Framework__Proto__VarType__Type type,
+                          Visitor visitor) {
+  switch (type) {
+    // case PADDLE_MOBILE__FRAMEWORK__PROTO__VAR_TYPE__TYPE__FP16:
+    //   visitor.template apply<float16>();
+    //   break;
+    case PADDLE_MOBILE__FRAMEWORK__PROTO__VAR_TYPE__TYPE__FP32:
+      visitor.template apply<float>();
+      break;
+    case PADDLE_MOBILE__FRAMEWORK__PROTO__VAR_TYPE__TYPE__FP64:
+      visitor.template apply<double>();
+      break;
+    case PADDLE_MOBILE__FRAMEWORK__PROTO__VAR_TYPE__TYPE__INT32:
+      visitor.template apply<int>();
+      break;
+    case PADDLE_MOBILE__FRAMEWORK__PROTO__VAR_TYPE__TYPE__INT64:
+      visitor.template apply<int64_t>();
+      break;
+    case PADDLE_MOBILE__FRAMEWORK__PROTO__VAR_TYPE__TYPE__BOOL:
+      visitor.template apply<bool>();
+      break;
+    case PADDLE_MOBILE__FRAMEWORK__PROTO__VAR_TYPE__TYPE__UINT8:
+      visitor.template apply<uint8_t>();
+      break;
+    case PADDLE_MOBILE__FRAMEWORK__PROTO__VAR_TYPE__TYPE__INT16:
+      visitor.template apply<int16_t>();
+      break;
+    case PADDLE_MOBILE__FRAMEWORK__PROTO__VAR_TYPE__TYPE__INT8:
+      visitor.template apply<int8_t>();
+      break;
+    default:
+      PADDLE_MOBILE_THROW_EXCEPTION("Not supported %d", type);
+  }
+}
+
+extern std::string DataTypeToString(
+    const _PaddleMobile__Framework__Proto__VarType__Type type);
+inline std::ostream& operator<<(
+    std::ostream& out,
+    const _PaddleMobile__Framework__Proto__VarType__Type& type) {
+  out << DataTypeToString(type);
+  return out;
+}
+
+}  // namespace framework
+}  // namespace paddle_mobile
diff --git a/src/framework/load_ops.h b/src/framework/load_ops.h
index 7fd6290704a573aac535685b4bdf48092b35e98b..2b76b0158fe06e8678208f6f98fcdb71f8d91e51 100644
--- a/src/framework/load_ops.h
+++ b/src/framework/load_ops.h
@@ -64,6 +64,9 @@ limitations under the License. */
 // load requared ops
 LOAD_OP(feed)
 LOAD_OP(fetch)
+#ifdef FILL_CONSTANT_OP
+LOAD_OP(fill_constant)
+#endif
 #ifdef BATCHNORM_OP
 LOAD_OP2(batch_norm, CPU, MALI_GPU);
 #endif
diff --git a/src/operators/fill_constant_op.cpp b/src/operators/fill_constant_op.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..6d7c4f44f1b769c47d6f741d139118158292a40f
--- /dev/null
+++ b/src/operators/fill_constant_op.cpp
@@ -0,0 +1,30 @@
+/* Copyright (c) 2018 PaddlePaddle Authors. 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.
+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. */
+
+#ifdef FILL_CONSTANT_OP
+
+#include "operators/fill_constant_op.h"
+
+namespace ops = paddle_mobile::operators;
+#ifdef PADDLE_MOBILE_CPU
+REGISTER_OPERATOR_CPU(fill_constant, ops::FillConstantOp);
+#endif
+#ifdef PADDLE_MOBILE_MALI_GPU
+REGISTER_OPERATOR_MALI_GPU(fill_constant, ops::FillConstantOp);
+#endif
+#ifdef PADDLE_MOBILE_FPGA
+REGISTER_OPERATOR_FPGA(fill_constant, ops::FillConstantOp);
+#endif
+
+#endif
diff --git a/src/operators/fill_constant_op.h b/src/operators/fill_constant_op.h
new file mode 100644
index 0000000000000000000000000000000000000000..78eb162efc8ccd42b9fba363d49d1dbc4052f6b2
--- /dev/null
+++ b/src/operators/fill_constant_op.h
@@ -0,0 +1,81 @@
+/* Copyright (c) 2018 PaddlePaddle Authors. 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.
+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. */
+
+#ifdef FILL_CONSTANT_OP
+
+#pragma once
+
+#include <string>
+#include "framework/data_type.h"
+#include "framework/operator.h"
+#include "framework/selected_rows.h"
+#include "operators/math/math_function.h"
+#include "operators/op_param.h"
+
+namespace paddle_mobile {
+namespace operators {
+using std::string;
+
+template <typename DeviceType, typename T>
+class FillConstantOp : public framework::OperatorBase<DeviceType> {
+ public:
+  FillConstantOp(const string &type, const VariableNameMap &inputs,
+                 const VariableNameMap &outputs,
+                 const framework::AttributeMap attrs,
+                 std::shared_ptr<framework::Scope> scope)
+      : framework::OperatorBase<DeviceType>(type, inputs, outputs, attrs,
+                                            scope),
+        param_(inputs, outputs, attrs, *scope) {}
+  void RunImpl() const {
+    auto data_type =
+        static_cast<_PaddleMobile__Framework__Proto__VarType__Type>(
+            param_.DataDtype());
+    framework::Tensor *tensor = nullptr;
+    auto value = param_.Value();
+    auto *outvar = param_.OutVar();
+
+    if (outvar->template IsType<framework::LoDTensor>()) {
+      tensor = outvar->template GetMutable<framework::LoDTensor>();
+    } else if (outvar->template IsType<framework::SelectedRows>()) {
+      tensor = outvar->template GetMutable<framework::SelectedRows>()
+                   ->mutable_value();
+    } else {
+      PADDLE_MOBILE_THROW_EXCEPTION(
+          "fill constant op's output only"
+          "supports SelectedRows and LoDTensor");
+    }
+    tensor->Resize(framework::make_ddim(param_.Shape()));
+    tensor->mutable_data(framework::ToTypeIndex(data_type));
+
+    math::set_constant(tensor, value);
+  }
+
+  void Init() {}
+
+  void InferShape() const {
+    PADDLE_MOBILE_ENFORCE(
+        param_.Out() != nullptr,
+        "Output (Out) of fill_constant op should not be null.");
+    framework::DDim ddim = framework::make_ddim(param_.Shape());
+    param_.Out()->Resize(ddim);
+  }
+
+ protected:
+  FillConstantParam<DeviceType> param_;
+};
+
+}  // namespace operators
+}  // namespace paddle_mobile
+
+#endif
diff --git a/src/operators/math/math_function.cpp b/src/operators/math/math_function.cpp
index fc4c385add5ccf30ebe42695fb616e41deb1a827..4365bf5716b8b5811f6ac66217b2fe74ae116f52 100644
--- a/src/operators/math/math_function.cpp
+++ b/src/operators/math/math_function.cpp
@@ -15,12 +15,31 @@ limitations under the License. */
 #include "operators/math/math_function.h"
 #include <cstring>
 #include <string>
+#include "framework/data_type.h"
+#include "framework/tensor.h"
 #include "operators/math/gemm.h"
 
 namespace paddle_mobile {
 namespace operators {
 namespace math {
 
+struct TensorSetConstant {
+  TensorSetConstant(framework::Tensor *tensor, float value)
+      : tensor_(tensor), value_(value) {}
+  template <typename T>
+  void apply() const {
+    auto *begin = tensor_->mutable_data<T>();
+    std::fill(begin, begin + tensor_->numel(), static_cast<T>(value_));
+  }
+  framework::Tensor *tensor_;
+  float value_;
+};
+
+void set_constant(framework::Tensor *tensor, float value) {
+  framework::VisitDataType(framework::ToDataType(tensor->type()),
+                           TensorSetConstant(tensor, value));
+}
+
 template <>
 void matmul<float>(const framework::Tensor &matrix_a, bool trans_a,
                    const framework::Tensor &matrix_b, bool trans_b, float alpha,
diff --git a/src/operators/math/math_function.h b/src/operators/math/math_function.h
index da8f3e042ac441c44d99072fad9593042735c008..b91242c1868398e4541c3727567a905e5b0c8714 100644
--- a/src/operators/math/math_function.h
+++ b/src/operators/math/math_function.h
@@ -22,6 +22,8 @@ namespace paddle_mobile {
 namespace operators {
 namespace math {
 
+void set_constant(framework::Tensor *tensor, float value);
+
 template <typename T>
 void matmul(const framework::Tensor &matrix_a, bool trans_a,
             const framework::Tensor &matrix_b, bool trans_b, T alpha,
diff --git a/src/operators/op_param.h b/src/operators/op_param.h
index ba5bf40aab2ab81d42de4957c6aa12e30e84924d..568cf77b8e4e81732cd9a783c1a9ea64d347102b 100644
--- a/src/operators/op_param.h
+++ b/src/operators/op_param.h
@@ -1063,6 +1063,42 @@ class FetchParam : public OpParam {
   RType *out_;
 };
 
+#ifdef FILL_CONSTANT_OP
+template <typename Dtype>
+class FillConstantParam : public OpParam {
+  typedef typename DtypeTensorTrait<Dtype>::gtype GType;
+  typedef typename DtypeTensorTrait<Dtype>::rtype RType;
+
+ public:
+  FillConstantParam(const VariableNameMap &inputs,
+                    const VariableNameMap &outputs, const AttributeMap &attrs,
+                    const Scope &scope) {
+    out_var_ = OutVarFrom(outputs, scope);
+    out_ = OutFrom<GType>(outputs, scope);
+    dtype_ = GetAttr<int>("dtype", attrs);
+    shape_ = GetAttr<vector<int>>("shape", attrs);
+    value_ = GetAttr<float>("value", attrs);
+  }
+
+  Variable *OutVar() const { return out_var_; }
+
+  RType *Out() const { return out_; }
+
+  const int &DataDtype() const { return dtype_; }
+
+  const vector<int> &Shape() const { return shape_; }
+
+  const float &Value() const { return value_; }
+
+ private:
+  Variable *out_var_;
+  RType *out_;
+  int dtype_;
+  vector<int> shape_;
+  float value_;
+};
+#endif
+
 #ifdef TRANSPOSE_OP
 template <typename Dtype>
 class TransposeParam : public OpParam {
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 6f38a353765769f060e4c5468bd44d7d9a9b3b32..e3d79edf483c8182cd91bc0b82ad9989e211f671 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -185,6 +185,10 @@ if (NOT FOUND_MATCH)
     ADD_EXECUTABLE(test-polygon-box-transform-op operators/test_polygon_box_transform_op.cpp test_helper.h test_include.h)
     target_link_libraries(test-polygon-box-transform-op paddle-mobile)
 
+    # gen test
+    ADD_EXECUTABLE(test-fill-constant-op operators/test_fill_constant_op.cpp test_helper.h test_include.h)
+    target_link_libraries(test-fill-constant-op paddle-mobile)
+
     # gen test
     ADD_EXECUTABLE(test-reshape-op operators/test_reshape_op.cpp test_helper.h test_include.h)
     target_link_libraries(test-reshape-op paddle-mobile)
diff --git a/test/operators/test_fill_constant_op.cpp b/test/operators/test_fill_constant_op.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..b099217d1641eb221b3d0d86d780fb6ecfa929bd
--- /dev/null
+++ b/test/operators/test_fill_constant_op.cpp
@@ -0,0 +1,113 @@
+/* Copyright (c) 2018 PaddlePaddle Authors. 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.
+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. */
+
+#pragma once
+#include "../test_include.h"
+#include "operators/fill_constant_op.h"
+
+namespace paddle_mobile {
+namespace framework {
+
+template <typename Dtype>
+class TestFillConstantOp {
+ public:
+  explicit TestFillConstantOp(const Program<Dtype> p) : program_(p) {
+    if (use_optimize_) {
+      to_predict_program_ = program_.optimizeProgram;
+    } else {
+      to_predict_program_ = program_.originProgram;
+    }
+    const std::vector<std::shared_ptr<BlockDesc>> blocks =
+        to_predict_program_->Blocks();
+    for (auto block_desc : blocks) {
+      std::vector<std::shared_ptr<OpDesc>> ops = block_desc->Ops();
+      for (auto op : ops) {
+        if (op->Type() == "fill_constant") {
+          DLOG << " attr size: " << op->GetAttrMap().size();
+          std::unordered_map<std::string, Attribute> attrs = op->GetAttrMap();
+          for (std::unordered_map<std::string, Attribute>::iterator it =
+                   attrs.begin();
+               it != attrs.end(); ++it) {
+            DLOG << "  " << it->first << " " << it->second;
+          }
+          DLOG << " inputs size: " << op->GetInputs().size();
+          DLOG << " outputs size: " << op->GetOutputs().size();
+          DLOG << " output is : " << op->Output("Out")[0];
+          output_var_name = op->Output("Out")[0];
+          std::shared_ptr<operators::FillConstantOp<Dtype, float>> op_ptr =
+              std::make_shared<operators::FillConstantOp<Dtype, float>>(
+                  op->Type(), op->GetInputs(), op->GetOutputs(),
+                  op->GetAttrMap(), program_.scope);
+          ops_of_block_[*block_desc.get()].push_back(op_ptr);
+        }
+      }
+    }
+  }
+
+  std::shared_ptr<Tensor> predict() {
+    auto scope = program_.scope;
+
+    Variable *output = scope->Var(output_var_name);
+    auto *output_tensor = output->GetMutable<LoDTensor>();
+
+    std::shared_ptr<Tensor> out_tensor = std::make_shared<LoDTensor>();
+    out_tensor.reset(output_tensor);
+
+    predict(0);
+
+    return out_tensor;
+  }
+
+ private:
+  const framework::Program<Dtype> program_;
+  std::shared_ptr<ProgramDesc> to_predict_program_;
+  std::map<framework::BlockDesc,
+           std::vector<std::shared_ptr<OperatorBase<Dtype>>>>
+      ops_of_block_;
+  bool use_optimize_ = false;
+  string output_var_name;
+
+  void predict(int block_id) {
+    std::shared_ptr<BlockDesc> to_predict_block =
+        to_predict_program_->Block(block_id);
+    for (int j = 0; j < ops_of_block_[*to_predict_block.get()].size(); ++j) {
+      auto op = ops_of_block_[*to_predict_block.get()][j];
+      op->Run();
+    }
+  }
+};
+
+template class TestFillConstantOp<CPU>;
+}  // namespace framework
+}  // namespace paddle_mobile
+
+int main() {
+  DLOG << "----------**********----------";
+  DLOG << "begin to run FillConstant Test";
+  paddle_mobile::Loader<paddle_mobile::CPU> loader;
+  auto program = loader.Load(std::string(g_ocr) + "/model",
+                             std::string(g_ocr) + "/params");
+
+  paddle_mobile::framework::TestFillConstantOp<paddle_mobile::CPU>
+      testFillConstantOp(program);
+
+  auto output = testFillConstantOp.predict();
+  auto *output_ptr = output->data<float>();
+
+  DLOG << "output : ";
+  for (int i = 0; i < output->numel(); ++i) {
+    DLOG << " index " << i << " : " << output_ptr[i];
+  }
+  return 0;
+}
diff --git a/tools/op.cmake b/tools/op.cmake
index 68f363eef4d641a7d0a65ed9132ef6e54616ffcf..f7a6ed4b134f78ddb23487cd3a861f244e6a86db 100644
--- a/tools/op.cmake
+++ b/tools/op.cmake
@@ -188,6 +188,7 @@ if(NOT FOUND_MATCH)
   set(ELEMENTWISEADD_OP ON)
   set(ELEMENTWISESUB_OP ON)
   set(IM2SEQUENCE_OP ON)
+  set(FILL_CONSTANT_OP ON)
   set(FUSION_CONVADD_OP ON)
   set(FUSION_CONVADDPRELU_OP ON)
   set(FUSION_CONVADDRELU_OP ON)
@@ -233,6 +234,7 @@ endif()
   # option(CONV_OP "" ON)
   # option(DEPTHWISECONV_OP "" ON)
   # option(ELEMENTWISEADD_OP "" ON)
+  # option(FILL_CONSTANT_OP "" ON)
   # option(FUSION_CONVADD_OP "" ON)
   # option(FUSION_CONVADDRELU_OP "" ON)
   # option(FUSION_FC_OP "" ON)
@@ -270,6 +272,9 @@ endif()
 if (ELEMENTWISESUB_OP)
   add_definitions(-DELEMENTWISESUB_OP)
 endif()
+if (FILL_CONSTANT_OP)
+  add_definitions(-DFILL_CONSTANT_OP)
+endif()
 if (FUSION_CONVADD_OP)
   add_definitions(-DFUSION_CONVADD_OP)
 endif()