diff --git a/src/framework/load_ops.h b/src/framework/load_ops.h
index 3beae9eddd322b2df33090268c9c4fd1b38fa57b..2738e2470ecdfcde6f259e3f20be80bebdd4c925 100644
--- a/src/framework/load_ops.h
+++ b/src/framework/load_ops.h
@@ -127,6 +127,9 @@ LOAD_OP2(transpose2, CPU, GPU_CL);
 #ifdef PRIORBOX_OP
 LOAD_OP2(prior_box, CPU, GPU_CL);
 #endif
+#ifdef DENSITY_PRIORBOX_OP
+LOAD_OP2(density_prior_box, CPU, GPU_CL);
+#endif
 #ifdef FUSION_CONVADDRELU_OP
 LOAD_OP3(fusion_conv_add_relu, CPU, GPU_CL, FPGA);
 LOAD_FUSION_MATCHER(fusion_conv_add_relu);
@@ -158,7 +161,9 @@ LOAD_OP1(prelu, CPU);
 #endif
 #ifdef FLATTEN_OP
 LOAD_OP1(flatten, CPU);
-LOAD_OP1(flatten2, CPU);
+#endif
+#ifdef FLATTEN2_OP
+LOAD_OP2(flatten2, CPU, GPU_CL);
 #endif
 #ifdef FUSION_CONVBNADDRELU_OP
 LOAD_OP3(fusion_conv_bn_add_relu, CPU, GPU_CL, FPGA);
diff --git a/src/operators/flatten2_op.cpp b/src/operators/flatten2_op.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..99addf0fdbd8b7f6ca2eb553e46db3b56eb47f44
--- /dev/null
+++ b/src/operators/flatten2_op.cpp
@@ -0,0 +1,32 @@
+/* Copyright (c) 2019 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 FLATTEN2_OP
+
+#include "operators/flatten2_op.h"
+namespace paddle_mobile {
+namespace operators {
+template <typename DeviceType, typename T>
+void Flatten2Op<DeviceType, T>::InferShape() const {}
+
+}  // namespace operators
+}  // namespace paddle_mobile
+
+namespace ops = paddle_mobile::operators;
+
+#ifdef PADDLE_MOBILE_CL
+REGISTER_OPERATOR_CL(flatten2, ops::Flatten2Op);
+#endif
+
+#endif
diff --git a/src/operators/flatten2_op.h b/src/operators/flatten2_op.h
new file mode 100644
index 0000000000000000000000000000000000000000..9c08e9c3351381c8163f5e9dc90a00ec7ed50a56
--- /dev/null
+++ b/src/operators/flatten2_op.h
@@ -0,0 +1,34 @@
+/* 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 FLATTEN2_OP
+
+#pragma once
+
+#include <string>
+#include <vector>
+
+#include "framework/operator.h"
+#include "operators/kernel/flatten2_kernel.h"
+#include "operators/op_param.h"
+
+namespace paddle_mobile {
+namespace operators {
+
+DECLARE_OPERATOR(Flatten2, FlattenParam, Flatten2Kernel);
+
+}  // namespace operators
+}  // namespace paddle_mobile
+
+#endif
diff --git a/src/operators/kernel/cl/cl_kernel/density_prior_box_kernel.cl b/src/operators/kernel/cl/cl_kernel/density_prior_box_kernel.cl
new file mode 100644
index 0000000000000000000000000000000000000000..9d12c0c5f25de1d1f483c37b46c58fdb2fe14a3b
--- /dev/null
+++ b/src/operators/kernel/cl/cl_kernel/density_prior_box_kernel.cl
@@ -0,0 +1,9 @@
+
+
+
+
+
+
+__kernel void density_prior_box(){
+
+}
\ No newline at end of file
diff --git a/src/operators/kernel/cl/cl_kernel/flatten2_kernel.cl b/src/operators/kernel/cl/cl_kernel/flatten2_kernel.cl
new file mode 100644
index 0000000000000000000000000000000000000000..c7b688d8ae8a3094b4915a800e2623e11ae651f9
--- /dev/null
+++ b/src/operators/kernel/cl/cl_kernel/flatten2_kernel.cl
@@ -0,0 +1,8 @@
+
+
+
+
+
+__kernel void flatten2(){
+
+}
\ No newline at end of file
diff --git a/src/operators/kernel/cl/density_prior_box_kernel.cpp b/src/operators/kernel/cl/density_prior_box_kernel.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..e182c0598cfc3041993678fd54beaea4736fc444
--- /dev/null
+++ b/src/operators/kernel/cl/density_prior_box_kernel.cpp
@@ -0,0 +1,39 @@
+/* Copyright (c) 2019 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 DENSITY_PRIORBOX_OP
+
+#include <operators/kernel/prior_box_kernel.h>
+
+namespace paddle_mobile {
+namespace operators {
+
+template <>
+bool DensityPriorBoxKernel<GPU_CL, float>::Init(
+    paddle_mobile::operators::DensityPriorBoxParam<paddle_mobile::GPU_CL>
+        *param) {
+  this->cl_helper_.AddKernel("density_prior_box",
+                             "density_prior_box_kernel.cl");
+  return true;
+}
+
+template <>
+void DensityPriorBoxKernel<GPU_CL, float>::Compute(
+    const paddle_mobile::operators::DensityPriorBoxParam<paddle_mobile::GPU_CL>
+        &param) {}
+
+}  // namespace operators
+}  // namespace paddle_mobile
+
+#endif
diff --git a/src/operators/kernel/cl/flatten2_kernel.cpp b/src/operators/kernel/cl/flatten2_kernel.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..c1b60e673d7a8e5a2599494d2bb679fef71971e7
--- /dev/null
+++ b/src/operators/kernel/cl/flatten2_kernel.cpp
@@ -0,0 +1,37 @@
+/* Copyright (c) 2019 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 FLATTEN2_OP
+
+#include "operators/kernel/flatten2_kernel.h"
+
+namespace paddle_mobile {
+namespace operators {
+
+template <>
+bool Flatten2Kernel<GPU_CL, float>::Init(
+    paddle_mobile::operators::FlattenParam<paddle_mobile::GPU_CL> *param) {
+  this->cl_helper_.AddKernel("flatten2", "flatten2_kernel.cl");
+  return true;
+}
+
+template <>
+void Flatten2Kernel<GPU_CL, float>::Compute(
+    const paddle_mobile::operators::FlattenParam<paddle_mobile::GPU_CL>
+        &param) {}
+
+}  // namespace operators
+}  // namespace paddle_mobile
+
+#endif
diff --git a/src/operators/kernel/flatten2_kernel.h b/src/operators/kernel/flatten2_kernel.h
new file mode 100644
index 0000000000000000000000000000000000000000..78b3e820e63012139ef857d882b7b0855fe54035
--- /dev/null
+++ b/src/operators/kernel/flatten2_kernel.h
@@ -0,0 +1,28 @@
+/* Copyright (c) 2019 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. */
+
+//
+// Created by hujie09 on 2019-07-31.
+//
+
+#ifdef FLATTEN2_OP
+#include <operators/op_param.h>
+#include "framework/operator.h"
+namespace paddle_mobile {
+namespace operators {
+DECLARE_KERNEL(Flatten2, FlattenParam)
+}
+}  // namespace paddle_mobile
+
+#endif  // FLATTEN2_KERNEL
diff --git a/src/operators/prior_box_op.cpp b/src/operators/prior_box_op.cpp
index abef57e2bb3809ce280ebb9f1cfce8ef981e5bd5..da37273de5c45f5ab132ef1961fc7c7f71842ffd 100644
--- a/src/operators/prior_box_op.cpp
+++ b/src/operators/prior_box_op.cpp
@@ -95,4 +95,7 @@ REGISTER_OPERATOR_CPU(density_prior_box, ops::DensityPriorBoxOp);
 #ifdef PRIORBOX_OP
 REGISTER_OPERATOR_CL(prior_box, ops::PriorBoxOp);
 #endif  // PRIORBOX_OP
+#ifdef DENSITY_PRIORBOX_OP
+REGISTER_OPERATOR_CL(density_prior_box, ops::DensityPriorBoxOp);
+#endif  // DENSITY_PRIORBOX_OP
 #endif  // PADDLE_MOBILE_CL
diff --git a/tools/op.cmake b/tools/op.cmake
index b8ea4cb7b72efa7ab041a9c5cb87a452cffbb01a..eb23a5b39163cf452cc3503a95ee8169cd4c0c93 100755
--- a/tools/op.cmake
+++ b/tools/op.cmake
@@ -237,6 +237,7 @@ if (CON GREATER -1)
   set(BOXCODER_OP ON)
   set(MULTICLASSNMS_OP ON)
   set(FLATTEN_OP ON)
+  set(FLATTEN2_OP ON)
   set(SPLIT_OP ON)
   set(SHAPE_OP ON)
 
@@ -328,6 +329,7 @@ if(NOT FOUND_MATCH)
   set(BILINEAR_INTERP_OP ON)
   set(SPLIT_OP ON)
   set(FLATTEN_OP ON)
+  set(FLATTEN2_OP ON)
   set(SHAPE_OP ON)
   set(ELEMENTWISEMUL_OP ON)
   set(SUM_OP ON)
@@ -555,6 +557,10 @@ if (FLATTEN_OP)
   add_definitions(-DFLATTEN_OP)
 endif()
 
+if (FLATTEN2_OP)
+  add_definitions(-DFLATTEN2_OP)
+endif()
+
 if (SPLIT_OP)
   add_definitions(-DSPLIT_OP)
 endif()