diff --git a/paddle/fluid/operators/deformable_conv_op_mlu.cc b/paddle/fluid/operators/deformable_conv_op_mlu.cc
new file mode 100644
index 0000000000000000000000000000000000000000..a280d7ef1ad1f602f34a2b62af3c4408651fadad
--- /dev/null
+++ b/paddle/fluid/operators/deformable_conv_op_mlu.cc
@@ -0,0 +1,248 @@
+/* Copyright (c) 2022 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 "paddle/fluid/framework/op_registry.h"
+#include "paddle/fluid/operators/mlu/mlu_baseop.h"
+
+namespace paddle {
+namespace operators {
+
+using Tensor = framework::Tensor;
+
+template <typename T>
+class DeformableConvMLUKernel : public framework::OpKernel<T> {
+ public:
+  void Compute(const framework::ExecutionContext& ctx) const override {
+    auto* input = ctx.Input<Tensor>("Input");
+    auto* offset = ctx.Input<Tensor>("Offset");
+    auto* mask = ctx.Input<Tensor>("Mask");
+    auto* filter = ctx.Input<Tensor>("Filter");
+    auto* output = ctx.Output<Tensor>("Output");
+    output->mutable_data<T>(ctx.GetPlace());
+
+    const int groups = ctx.Attr<int>("groups");
+    const int deformable_groups = ctx.Attr<int>("deformable_groups");
+    const int im2col_step = ctx.Attr<int>("im2col_step");
+    const std::vector<int> strides = ctx.Attr<std::vector<int>>("strides");
+    const std::vector<int> paddings = ctx.Attr<std::vector<int>>("paddings");
+    const std::vector<int> dilations = ctx.Attr<std::vector<int>>("dilations");
+
+    // TODO(fwg): Remove this check when cnnl fix the bug that groups > 1.
+    PADDLE_ENFORCE_EQ(
+        groups == 1, true,
+        platform::errors::InvalidArgument(
+            "MLU deformable_conv kernel only support groups == 1, but get %d.",
+            groups));
+
+    // transform paddings from {h, w} to {top, bottom, left, right}.
+    const std::vector<int> trans_paddings{paddings[0], paddings[0], paddings[1],
+                                          paddings[1]};
+    MLUCnnlDCNDesc dcn_desc(input->dims().size(), trans_paddings.data(),
+                            strides.data(), dilations.data(), deformable_groups,
+                            groups, im2col_step);
+
+    const std::vector<int> perm_to_nhwc = {0, 2, 3, 1};
+    Tensor trans_input(input->dtype());
+    TransposeFromMLUTensor<T>(ctx, perm_to_nhwc, input, &trans_input,
+                              true /*need_reshape_or_alloc*/);
+
+    Tensor trans_offset(offset->dtype());
+    TransposeFromMLUTensor<T>(ctx, perm_to_nhwc, offset, &trans_offset,
+                              true /*need_reshape_or_alloc*/);
+
+    Tensor trans_mask(mask->dtype());
+    TransposeFromMLUTensor<T>(ctx, perm_to_nhwc, mask, &trans_mask,
+                              true /*need_reshape_or_alloc*/);
+
+    Tensor trans_filter(filter->dtype());
+    TransposeFromMLUTensor<T>(ctx, perm_to_nhwc, filter, &trans_filter,
+                              true /*need_reshape_or_alloc*/);
+
+    Tensor tmp_output(output->dtype());
+    auto output_dims = output->dims();
+    tmp_output.mutable_data<T>(
+        {output_dims[0], output_dims[2], output_dims[3], output_dims[1]},
+        ctx.GetPlace());
+
+    cnnlTensorLayout_t data_layout = CNNL_LAYOUT_NHWC;
+    MLUCnnlTensorDesc input_desc(trans_input, data_layout,
+                                 ToCnnlDataType(trans_input.dtype()));
+    MLUCnnlTensorDesc offset_desc(trans_offset, data_layout,
+                                  ToCnnlDataType(trans_offset.dtype()));
+    MLUCnnlTensorDesc mask_desc(trans_mask, data_layout,
+                                ToCnnlDataType(trans_mask.dtype()));
+    MLUCnnlTensorDesc filter_desc(trans_filter, data_layout,
+                                  ToCnnlDataType(trans_filter.dtype()));
+    MLUCnnlTensorDesc output_desc(tmp_output, data_layout,
+                                  ToCnnlDataType(tmp_output.dtype()));
+    MLUCnnl::DCNForward(
+        ctx, dcn_desc.get(), input_desc.get(), GetBasePtr(&trans_input),
+        offset_desc.get(), GetBasePtr(&trans_offset), mask_desc.get(),
+        GetBasePtr(&trans_mask), filter_desc.get(), GetBasePtr(&trans_filter),
+        nullptr, nullptr, output_desc.get(), GetBasePtr(&tmp_output));
+
+    const std::vector<int> perm_to_nchw = {0, 3, 1, 2};
+    TransposeFromMLUTensor<T>(ctx, perm_to_nchw, &tmp_output, output,
+                              false /*need_reshape_or_alloc*/);
+  }
+};
+
+template <typename T>
+class DeformableConvGradMLUKernel : public framework::OpKernel<T> {
+ public:
+  void Compute(const framework::ExecutionContext& ctx) const override {
+    const Tensor* output_grad =
+        ctx.Input<Tensor>(framework::GradVarName("Output"));
+    auto* input_grad = ctx.Output<Tensor>(framework::GradVarName("Input"));
+    auto* filter_grad = ctx.Output<Tensor>(framework::GradVarName("Filter"));
+    auto* offset_grad = ctx.Output<Tensor>(framework::GradVarName("Offset"));
+    auto* mask_grad = ctx.Output<Tensor>(framework::GradVarName("Mask"));
+
+    const Tensor* input = ctx.Input<Tensor>("Input");
+    auto* offset = ctx.Input<Tensor>("Offset");
+    auto* mask = ctx.Input<Tensor>("Mask");
+    auto* filter = ctx.Input<Tensor>("Filter");
+
+    int groups = ctx.Attr<int>("groups");
+    int deformable_groups = ctx.Attr<int>("deformable_groups");
+    int im2col_step = ctx.Attr<int>("im2col_step");
+    std::vector<int> strides = ctx.Attr<std::vector<int>>("strides");
+    std::vector<int> paddings = ctx.Attr<std::vector<int>>("paddings");
+    std::vector<int> dilations = ctx.Attr<std::vector<int>>("dilations");
+
+    // TODO(fwg): Remove this check when cnnl fix the bug that groups > 1.
+    PADDLE_ENFORCE_EQ(groups == 1, true,
+                      platform::errors::InvalidArgument(
+                          "MLU deformable_conv_grad kernel only support groups "
+                          "== 1, but get %d.",
+                          groups));
+
+    // transform paddings from {h, w} to {top, bottom, left, right}.
+    const std::vector<int> trans_paddings{paddings[0], paddings[0], paddings[1],
+                                          paddings[1]};
+    MLUCnnlDCNDesc dcn_desc(input->dims().size(), trans_paddings.data(),
+                            strides.data(), dilations.data(), deformable_groups,
+                            groups, im2col_step);
+
+    Tensor tmp_input_grad;
+    auto input_dims = input->dims();
+    tmp_input_grad.mutable_data<T>(
+        {input_dims[0], input_dims[2], input_dims[3], input_dims[1]},
+        ctx.GetPlace());
+
+    Tensor tmp_filter_grad;
+    auto filter_dims = filter->dims();
+    tmp_filter_grad.mutable_data<T>(
+        {filter_dims[0], filter_dims[2], filter_dims[3], filter_dims[1]},
+        ctx.GetPlace());
+
+    Tensor tmp_offset_grad;
+    auto offset_dims = offset->dims();
+    tmp_offset_grad.mutable_data<T>(
+        {offset_dims[0], offset_dims[2], offset_dims[3], offset_dims[1]},
+        ctx.GetPlace());
+
+    Tensor tmp_mask_grad;
+    auto mask_dims = mask->dims();
+    tmp_mask_grad.mutable_data<T>(
+        {mask_dims[0], mask_dims[2], mask_dims[3], mask_dims[1]},
+        ctx.GetPlace());
+
+    const std::vector<int> perm_to_nhwc = {0, 2, 3, 1};
+    Tensor trans_output_grad(output_grad->dtype());
+    TransposeFromMLUTensor<T>(ctx, perm_to_nhwc, output_grad,
+                              &trans_output_grad,
+                              true /*need_reshape_or_alloc*/);
+
+    Tensor trans_input(input->dtype());
+    TransposeFromMLUTensor<T>(ctx, perm_to_nhwc, input, &trans_input,
+                              true /*need_reshape_or_alloc*/);
+
+    Tensor trans_offset(offset->dtype());
+    TransposeFromMLUTensor<T>(ctx, perm_to_nhwc, offset, &trans_offset,
+                              true /*need_reshape_or_alloc*/);
+
+    Tensor trans_mask(mask->dtype());
+    TransposeFromMLUTensor<T>(ctx, perm_to_nhwc, mask, &trans_mask,
+                              true /*need_reshape_or_alloc*/);
+
+    Tensor trans_filter(filter->dtype());
+    TransposeFromMLUTensor<T>(ctx, perm_to_nhwc, filter, &trans_filter,
+                              true /*need_reshape_or_alloc*/);
+
+    cnnlTensorLayout_t data_layout = CNNL_LAYOUT_NHWC;
+    MLUCnnlTensorDesc output_grad_desc(
+        trans_output_grad, data_layout,
+        ToCnnlDataType(trans_output_grad.dtype()));
+    MLUCnnlTensorDesc input_desc(trans_input, data_layout,
+                                 ToCnnlDataType(trans_input.dtype()));
+    MLUCnnlTensorDesc offset_desc(trans_offset, data_layout,
+                                  ToCnnlDataType(trans_offset.dtype()));
+    MLUCnnlTensorDesc mask_desc(trans_mask, data_layout,
+                                ToCnnlDataType(trans_mask.dtype()));
+    MLUCnnlTensorDesc filter_desc(trans_filter, data_layout,
+                                  ToCnnlDataType(trans_filter.dtype()));
+
+    MLUCnnl::DCNBackwardData(
+        ctx, dcn_desc.get(), input_desc.get(), GetBasePtr(&trans_input),
+        offset_desc.get(), GetBasePtr(&trans_offset), mask_desc.get(),
+        GetBasePtr(&trans_mask), filter_desc.get(), GetBasePtr(&trans_filter),
+        output_grad_desc.get(), GetBasePtr(&trans_output_grad),
+        input_desc.get(), GetBasePtr(&tmp_input_grad), offset_desc.get(),
+        GetBasePtr(&tmp_offset_grad), mask_desc.get(),
+        GetBasePtr(&tmp_mask_grad));
+
+    MLUCnnl::DCNBackwardWeight(
+        ctx, dcn_desc.get(), input_desc.get(), GetBasePtr(&trans_input),
+        offset_desc.get(), GetBasePtr(&trans_offset), mask_desc.get(),
+        GetBasePtr(&trans_mask), output_grad_desc.get(),
+        GetBasePtr(&trans_output_grad), filter_desc.get(),
+        GetBasePtr(&tmp_filter_grad), nullptr, nullptr);
+
+    const std::vector<int> perm_to_nchw = {0, 3, 1, 2};
+    if (input_grad) {
+      input_grad->mutable_data<T>(ctx.GetPlace());
+      TransposeFromMLUTensor<T>(ctx, perm_to_nchw, &tmp_input_grad, input_grad,
+                                false /*need_reshape_or_alloc*/);
+    }
+
+    if (filter_grad) {
+      filter_grad->mutable_data<T>(ctx.GetPlace());
+      TransposeFromMLUTensor<T>(ctx, perm_to_nchw, &tmp_filter_grad,
+                                filter_grad, false /*need_reshape_or_alloc*/);
+    }
+
+    if (offset_grad) {
+      offset_grad->mutable_data<T>(ctx.GetPlace());
+      TransposeFromMLUTensor<T>(ctx, perm_to_nchw, &tmp_offset_grad,
+                                offset_grad, false /*need_reshape_or_alloc*/);
+    }
+
+    if (mask_grad) {
+      mask_grad->mutable_data<T>(ctx.GetPlace());
+      TransposeFromMLUTensor<T>(ctx, perm_to_nchw, &tmp_mask_grad, mask_grad,
+                                false /*need_reshape_or_alloc*/);
+    }
+  }
+};
+
+}  // namespace operators
+}  // namespace paddle
+
+namespace ops = paddle::operators;
+namespace plat = paddle::platform;
+
+REGISTER_OP_MLU_KERNEL(deformable_conv, ops::DeformableConvMLUKernel<float>);
+REGISTER_OP_MLU_KERNEL(deformable_conv_grad,
+                       ops::DeformableConvGradMLUKernel<float>);
diff --git a/paddle/fluid/operators/mlu/mlu_baseop.cc b/paddle/fluid/operators/mlu/mlu_baseop.cc
index 89ea065e21c7f2f8faac54db1871664f4247a9df..445a9fecff74b464cd4be3dce34e39859540a3a1 100644
--- a/paddle/fluid/operators/mlu/mlu_baseop.cc
+++ b/paddle/fluid/operators/mlu/mlu_baseop.cc
@@ -506,6 +506,24 @@ MLUCnnlTrigonDesc::~MLUCnnlTrigonDesc() {
   }
 }
 
+MLUCnnlDCNDesc::MLUCnnlDCNDesc(int dimNb, const int* pad, const int* stride,
+                               const int* dilation, int deformable_group,
+                               int conv_group, int im2col_step) {
+  PADDLE_ENFORCE_MLU_SUCCESS(cnnlCreateDCNDescriptor(&dcn_desc_));
+  const cnnlDataType_t compute_type = CNNL_DTYPE_FLOAT;
+  PADDLE_ENFORCE_MLU_SUCCESS(cnnlSetDCNDescriptor(
+      dcn_desc_, dimNb, pad, stride, dilation, deformable_group, conv_group,
+      im2col_step, compute_type));
+}
+
+const cnnlDCNDescriptor_t MLUCnnlDCNDesc::get() const { return dcn_desc_; }
+
+MLUCnnlDCNDesc::~MLUCnnlDCNDesc() {
+  if (dcn_desc_) {
+    PADDLE_ENFORCE_MLU_SUCCESS(cnnlDestroyDCNDescriptor(dcn_desc_));
+  }
+}
+
 /* static */ void MLUCnnl::Active(const ExecutionContext& ctx,
                                   cnnlActivationDescriptor_t active_desc,
                                   const cnnlTensorDescriptor_t input_desc,
@@ -2488,6 +2506,88 @@ MLUCnnlTrigonDesc::~MLUCnnlTrigonDesc() {
       workspace_size, nullptr /*beta*/, filter_backprop_desc, filter_backprop));
 }
 
+/* static */ void MLUCnnl::DCNForward(
+    const ExecutionContext& ctx, const cnnlDCNDescriptor_t dcn_desc,
+    const cnnlTensorDescriptor_t input_desc, const void* input,
+    const cnnlTensorDescriptor_t offset_desc, const void* offset,
+    const cnnlTensorDescriptor_t mask_desc, const void* mask,
+    const cnnlTensorDescriptor_t weight_desc, const void* weight,
+    const cnnlTensorDescriptor_t bias_desc, const void* bias,
+    const cnnlTensorDescriptor_t output_desc, void* output) {
+  cnnlHandle_t handle = GetHandleFromCTX(ctx);
+
+  size_t workspace_size = 0;
+  PADDLE_ENFORCE_MLU_SUCCESS(cnnlGetDCNForwardWorkspaceSize(
+      handle, dcn_desc, input_desc, offset_desc, mask_desc, weight_desc,
+      bias_desc, output_desc, &workspace_size));
+
+  auto& dev_ctx = GetDevCtxFromCTX(ctx);
+  Tensor workspace = ctx.AllocateTmpTensor<int8_t, MLUDeviceContext>(
+      {static_cast<int64_t>(workspace_size)}, dev_ctx);
+  void* workspace_ptr = workspace.mutable_data(ctx.GetPlace());
+
+  PADDLE_ENFORCE_MLU_SUCCESS(
+      cnnlDCNForward(handle, dcn_desc, input_desc, input, offset_desc, offset,
+                     mask_desc, mask, weight_desc, weight, bias_desc, bias,
+                     workspace_ptr, workspace_size, output_desc, output));
+}
+
+/* static */ void MLUCnnl::DCNBackwardData(
+    const ExecutionContext& ctx, const cnnlDCNDescriptor_t dcn_desc,
+    const cnnlTensorDescriptor_t input_desc, const void* input,
+    const cnnlTensorDescriptor_t offset_desc, const void* offset,
+    const cnnlTensorDescriptor_t mask_desc, const void* mask,
+    const cnnlTensorDescriptor_t weight_desc, const void* weight,
+    const cnnlTensorDescriptor_t grad_output_desc, const void* grad_output,
+    const cnnlTensorDescriptor_t grad_input_desc, void* grad_input,
+    const cnnlTensorDescriptor_t grad_offset_desc, void* grad_offset,
+    const cnnlTensorDescriptor_t grad_mask_desc, void* grad_mask) {
+  cnnlHandle_t handle = GetHandleFromCTX(ctx);
+
+  size_t workspace_size = 0;
+  PADDLE_ENFORCE_MLU_SUCCESS(cnnlGetDCNBakcwardDataWorkspaceSize(
+      handle, dcn_desc, input_desc, offset_desc, mask_desc, weight_desc,
+      grad_output_desc, grad_input_desc, grad_offset_desc, grad_mask_desc,
+      &workspace_size));
+
+  auto& dev_ctx = GetDevCtxFromCTX(ctx);
+  Tensor workspace = ctx.AllocateTmpTensor<int8_t, MLUDeviceContext>(
+      {static_cast<int64_t>(workspace_size)}, dev_ctx);
+  void* workspace_ptr = workspace.mutable_data(ctx.GetPlace());
+
+  PADDLE_ENFORCE_MLU_SUCCESS(cnnlDCNBackwardData(
+      handle, dcn_desc, input_desc, input, offset_desc, offset, mask_desc, mask,
+      weight_desc, weight, grad_output_desc, grad_output, workspace_ptr,
+      workspace_size, grad_input_desc, grad_input, grad_offset_desc,
+      grad_offset, grad_mask_desc, grad_mask));
+}
+
+/* static */ void MLUCnnl::DCNBackwardWeight(
+    const ExecutionContext& ctx, const cnnlDCNDescriptor_t dcn_desc,
+    const cnnlTensorDescriptor_t input_desc, const void* input,
+    const cnnlTensorDescriptor_t offset_desc, const void* offset,
+    const cnnlTensorDescriptor_t mask_desc, const void* mask,
+    const cnnlTensorDescriptor_t grad_output_desc, const void* grad_output,
+    const cnnlTensorDescriptor_t grad_weight_desc, void* grad_weight,
+    const cnnlTensorDescriptor_t grad_bias_desc, void* grad_bias) {
+  cnnlHandle_t handle = GetHandleFromCTX(ctx);
+
+  size_t workspace_size = 0;
+  PADDLE_ENFORCE_MLU_SUCCESS(cnnlGetDCNBackwardWeightWorkspaceSize(
+      handle, dcn_desc, input_desc, offset_desc, mask_desc, grad_output_desc,
+      grad_weight_desc, grad_bias_desc, &workspace_size));
+
+  auto& dev_ctx = GetDevCtxFromCTX(ctx);
+  Tensor workspace = ctx.AllocateTmpTensor<int8_t, MLUDeviceContext>(
+      {static_cast<int64_t>(workspace_size)}, dev_ctx);
+  void* workspace_ptr = workspace.mutable_data(ctx.GetPlace());
+
+  PADDLE_ENFORCE_MLU_SUCCESS(cnnlDCNBackwardWeight(
+      handle, dcn_desc, input_desc, input, offset_desc, offset, mask_desc, mask,
+      grad_output_desc, grad_output, workspace_ptr, workspace_size,
+      grad_weight_desc, grad_weight, grad_bias_desc, grad_bias));
+}
+
 /* static */ void MLUCnnl::QuantizeMatMul(
     const ExecutionContext& ctx, const bool transpose_a, const bool transpose_b,
     const cnnlTensorDescriptor_t a_desc, const void* a, const void* a_position,
diff --git a/paddle/fluid/operators/mlu/mlu_baseop.h b/paddle/fluid/operators/mlu/mlu_baseop.h
index b8fa0cbdd4a8ccba8af206f680ff9a48008f4596..4ba7ae5ac6e9ef041673b62cca538502c7ebc209 100644
--- a/paddle/fluid/operators/mlu/mlu_baseop.h
+++ b/paddle/fluid/operators/mlu/mlu_baseop.h
@@ -444,6 +444,19 @@ class MLUCnnlTrigonDesc {
   cnnlTrigonDescriptor_t trigon_desc_ = nullptr;
 };
 
+class MLUCnnlDCNDesc {
+ public:
+  MLUCnnlDCNDesc(int dimNb, const int* pad, const int* stride,
+                 const int* dilation, int deformable_group, int conv_group,
+                 int im2col_step);
+  const cnnlDCNDescriptor_t get() const;
+
+  ~MLUCnnlDCNDesc();
+
+ private:
+  cnnlDCNDescriptor_t dcn_desc_ = nullptr;
+};
+
 class MLUCnnl {
  public:
   static void Active(const ExecutionContext& ctx,
@@ -1233,6 +1246,35 @@ class MLUCnnl {
       const cnnlTensorDescriptor_t out_backprop_desc, const void* out_backprop,
       const cnnlTensorDescriptor_t filter_backprop_desc, void* filter_backprop);
 
+  static void DCNForward(
+      const ExecutionContext& ctx, const cnnlDCNDescriptor_t dcn_desc,
+      const cnnlTensorDescriptor_t input_desc, const void* input,
+      const cnnlTensorDescriptor_t offset_desc, const void* offset,
+      const cnnlTensorDescriptor_t mask_desc, const void* mask,
+      const cnnlTensorDescriptor_t weight_desc, const void* weight,
+      const cnnlTensorDescriptor_t bias_desc, const void* bias,
+      const cnnlTensorDescriptor_t output_desc, void* output);
+
+  static void DCNBackwardData(
+      const ExecutionContext& ctx, const cnnlDCNDescriptor_t dcn_desc,
+      const cnnlTensorDescriptor_t input_desc, const void* input,
+      const cnnlTensorDescriptor_t offset_desc, const void* offset,
+      const cnnlTensorDescriptor_t mask_desc, const void* mask,
+      const cnnlTensorDescriptor_t weight_desc, const void* weight,
+      const cnnlTensorDescriptor_t grad_output_desc, const void* grad_output,
+      const cnnlTensorDescriptor_t grad_input_desc, void* grad_input,
+      const cnnlTensorDescriptor_t grad_offset_desc, void* grad_offset,
+      const cnnlTensorDescriptor_t grad_mask_desc, void* grad_mask);
+
+  static void DCNBackwardWeight(
+      const ExecutionContext& ctx, const cnnlDCNDescriptor_t dcn_desc,
+      const cnnlTensorDescriptor_t input_desc, const void* input,
+      const cnnlTensorDescriptor_t offset_desc, const void* offset,
+      const cnnlTensorDescriptor_t mask_desc, const void* mask,
+      const cnnlTensorDescriptor_t grad_output_desc, const void* grad_output,
+      const cnnlTensorDescriptor_t grad_weight_desc, void* grad_weight,
+      const cnnlTensorDescriptor_t grad_bias_desc, void* grad_bias);
+
   static void InTopK(const ExecutionContext& ctx,
                      const cnnlTensorDescriptor_t predictions_desc,
                      const void* predictions,
diff --git a/python/paddle/fluid/tests/unittests/mlu/test_deformable_conv_op_mlu.py b/python/paddle/fluid/tests/unittests/mlu/test_deformable_conv_op_mlu.py
new file mode 100644
index 0000000000000000000000000000000000000000..65cf070bf22660ede579c063945d409c7e7b3079
--- /dev/null
+++ b/python/paddle/fluid/tests/unittests/mlu/test_deformable_conv_op_mlu.py
@@ -0,0 +1,189 @@
+#   Copyright (c) 2022 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.
+
+from __future__ import print_function
+
+import paddle
+import unittest
+import numpy as np
+import paddle.fluid.core as core
+import paddle.fluid as fluid
+
+import sys
+
+sys.path.append('..')
+from op_test import OpTest
+from test_deformable_conv_op import dconv_im2col_gemm, deform_conv2d_wrapper
+
+paddle.enable_static()
+
+
+class TestModulatedDeformableConvOp(OpTest):
+
+    def setUp(self):
+        self.place = paddle.device.MLUPlace(0)
+        self.__class__.use_mlu = True
+        self.python_api = deform_conv2d_wrapper
+        self.op_type = "deformable_conv"
+        self.init_type()
+        self.init_group()
+        self.init_dilation()
+        self.init_test_case()
+
+        conv_param = {
+            'stride': self.stride,
+            'pad': self.pad,
+            'dilation': self.dilations
+        }
+
+        input = np.random.random(self.input_size).astype(self.dtype)
+        offset = 10 * np.random.random(self.offset_size).astype(self.dtype)
+        mask = 10 * np.random.random(self.mask_size).astype(self.dtype)
+        filter = np.random.random(self.filter_size).astype(self.dtype)
+
+        output = dconv_im2col_gemm(input, offset, mask, filter, self.groups,
+                                   conv_param)
+        output = output.astype(self.dtype)
+
+        self.inputs = {
+            'Input': OpTest.np_dtype_to_fluid_dtype(input),
+            'Offset': OpTest.np_dtype_to_fluid_dtype(offset),
+            'Mask': OpTest.np_dtype_to_fluid_dtype(mask),
+            'Filter': OpTest.np_dtype_to_fluid_dtype(filter)
+        }
+        self.attrs = {
+            'strides': self.stride,
+            'paddings': self.pad,
+            'groups': self.groups,
+            'deformable_groups': self.deformable_groups,
+            'im2col_step': self.im2col_step,
+            'dilations': self.dilations,
+        }
+        self.outputs = {'Output': output}
+
+    def test_check_output(self):
+        self.check_output_with_place(self.place, check_eager=False)
+
+    def test_check_grad(self):
+        self.check_grad_with_place(self.place,
+                                   {'Input', 'Offset', 'Mask', 'Filter'},
+                                   'Output',
+                                   max_relative_error=0.05,
+                                   check_eager=False)
+
+    def init_test_case(self):
+        self.pad = [1, 1]
+        self.stride = [1, 1]
+        self.dilations = [1, 1]
+        self.input_size = [2, 8, 4, 4]  # NCHW
+        assert np.mod(self.input_size[1], self.groups) == 0
+        f_c = self.input_size[1] // self.groups
+        self.filter_size = [4, f_c, 3, 3]
+        self.im2col_step = 1
+        self.deformable_groups = 1
+        offset_c = 2 * self.deformable_groups * self.filter_size[
+            2] * self.filter_size[3]
+        mask_c = self.deformable_groups * self.filter_size[
+            2] * self.filter_size[3]
+        self.offset_size = [
+            self.input_size[0], offset_c, self.input_size[2], self.input_size[3]
+        ]
+        self.mask_size = [
+            self.input_size[0], mask_c, self.input_size[2], self.input_size[3]
+        ]
+
+    def init_dilation(self):
+        self.dilations = [1, 1]
+
+    def init_group(self):
+        self.groups = 1
+
+    def init_type(self):
+        self.dtype = np.float32
+
+
+class TestWithStride(TestModulatedDeformableConvOp):
+
+    def init_test_case(self):
+        self.pad = [3, 3]
+        self.stride = [2, 2]
+        self.input_size = [2, 3, 5, 5]  # NCHW
+        assert np.mod(self.input_size[1], self.groups) == 0
+        f_c = self.input_size[1] // self.groups
+        self.filter_size = [6, f_c, 3, 3]
+        self.im2col_step = 1
+        self.deformable_groups = 1
+        offset_c = 2 * self.deformable_groups * self.filter_size[
+            2] * self.filter_size[3]
+        mask_c = self.deformable_groups * self.filter_size[
+            2] * self.filter_size[3]
+        self.offset_size = [
+            self.input_size[0], offset_c, self.input_size[2], self.input_size[3]
+        ]
+        self.mask_size = [
+            self.input_size[0], mask_c, self.input_size[2], self.input_size[3]
+        ]
+
+
+class TestWithDilation(TestModulatedDeformableConvOp):
+
+    def init_test_case(self):
+        self.pad = [2, 2]
+        self.stride = [1, 1]
+        self.input_size = [4, 3, 4, 4]  # NCHW
+        assert np.mod(self.input_size[1], self.groups) == 0
+        f_c = self.input_size[1] // self.groups
+        self.filter_size = [6, f_c, 3, 3]
+        self.im2col_step = 1
+        self.deformable_groups = 1
+        offset_c = 2 * self.deformable_groups * self.filter_size[
+            2] * self.filter_size[3]
+        mask_c = self.deformable_groups * self.filter_size[
+            2] * self.filter_size[3]
+        self.offset_size = [
+            self.input_size[0], offset_c, self.input_size[2], self.input_size[3]
+        ]
+        self.mask_size = [
+            self.input_size[0], mask_c, self.input_size[2], self.input_size[3]
+        ]
+
+    def init_dilation(self):
+        self.dilations = [2, 2]
+
+
+class TestWith3x3(TestModulatedDeformableConvOp):
+
+    def init_test_case(self):
+        self.pad = [1, 1]
+        self.stride = [1, 1]
+        self.input_size = [2, 3, 5, 5]  # NCHW
+        assert np.mod(self.input_size[1], self.groups) == 0
+        f_c = self.input_size[1] // self.groups
+        self.filter_size = [6, f_c, 3, 3]
+        self.im2col_step = 1
+        self.deformable_groups = 1
+        offset_c = 2 * self.deformable_groups * self.filter_size[
+            2] * self.filter_size[3]
+        mask_c = self.deformable_groups * self.filter_size[
+            2] * self.filter_size[3]
+        self.offset_size = [
+            self.input_size[0], offset_c, self.input_size[2], self.input_size[3]
+        ]
+        self.mask_size = [
+            self.input_size[0], mask_c, self.input_size[2], self.input_size[3]
+        ]
+
+
+if __name__ == '__main__':
+    unittest.main()