diff --git a/paddle/fluid/framework/CMakeLists.txt b/paddle/fluid/framework/CMakeLists.txt
index 11cf91f35a88f996d824c14feea7547f30e8ffcf..6eaa9c5be68d70c271f643bfb32e23b0d6bce99e 100644
--- a/paddle/fluid/framework/CMakeLists.txt
+++ b/paddle/fluid/framework/CMakeLists.txt
@@ -203,7 +203,7 @@ if(WITH_PSLIB)
                               trainer_factory.cc trainer.cc device_worker.cc hogwild_worker.cc 
                               downpour_worker.cc pull_dense_worker.cc device_worker_factory.cc
 			      DEPS op_registry device_context scope framework_proto
-			      trainer_desc_proto glog lod_rank_table
+			      trainer_desc_proto glog lod_rank_table fleet_wrapper
 			      feed_fetch_method graph_to_program_pass async_executor_proto
 			      variable_helper pslib_brpc pslib timer)
 else()
@@ -212,7 +212,7 @@ else()
                               trainer_factory.cc trainer.cc device_worker.cc hogwild_worker.cc
                               downpour_worker.cc pull_dense_worker.cc device_worker_factory.cc
 			      DEPS op_registry device_context scope framework_proto
-			      trainer_desc_proto glog lod_rank_table
+			      trainer_desc_proto glog lod_rank_table fleet_wrapper
 			      feed_fetch_method graph_to_program_pass async_executor_proto
 			      variable_helper timer)
 endif(WITH_PSLIB)
diff --git a/paddle/fluid/framework/async_executor.cc b/paddle/fluid/framework/async_executor.cc
index b79df98b0821f36734c38db29321df730883f8f6..610ab9f302994c24944bda705db2997f45cdf626 100644
--- a/paddle/fluid/framework/async_executor.cc
+++ b/paddle/fluid/framework/async_executor.cc
@@ -26,7 +26,9 @@ limitations under the License. */
 #include "paddle/fluid/framework/lod_tensor_array.h"
 #include "paddle/fluid/framework/op_registry.h"
 #include "paddle/fluid/framework/reader.h"
+#include "paddle/fluid/framework/trainer.h"
 #include "paddle/fluid/framework/trainer_desc.pb.h"
+#include "paddle/fluid/framework/trainer_factory.h"
 #include "paddle/fluid/inference/io.h"
 #include "paddle/fluid/platform/place.h"
 #include "paddle/fluid/pybind/pybind.h"
@@ -161,7 +163,7 @@ void AsyncExecutor::RunFromFile(const ProgramDesc& main_program,
   trainer = TrainerFactory::CreateTrainer(trainer_desc.class_name());
   // initialize trainer
   trainer->Initialize(trainer_desc);
-  // trainer->SetRootScope(root_scope_);
+  trainer->SetScope(root_scope_);
   trainer->SetDebug(debug);
   // prepare training environment and helper environment
   trainer->InitTrainerEnv(main_program, place_);
diff --git a/paddle/fluid/framework/async_executor.h b/paddle/fluid/framework/async_executor.h
index 4623672279f4d8d4cfb0242d910164150b06bd11..d25a109e5f301911af1c7023333b0afc106f15a7 100644
--- a/paddle/fluid/framework/async_executor.h
+++ b/paddle/fluid/framework/async_executor.h
@@ -75,14 +75,6 @@ class AsyncExecutor {
   void InitModel();
   void SaveModel(const std::string& path);
 
- private:
-  void CreateThreads(ExecutorThreadWorker* worker,
-                     const ProgramDesc& main_program,
-                     const std::shared_ptr<DataFeed>& reader,
-                     const std::vector<std::string>& fetch_var_names,
-                     Scope* root_scope, const int thread_index,
-                     const bool debug);
-
  public:
   std::shared_ptr<paddle::framework::FleetWrapper> fleet_ptr_;
   Scope* root_scope_;
diff --git a/paddle/fluid/framework/device_worker.h b/paddle/fluid/framework/device_worker.h
index 1367fa1a20aa46bb9dfc34fe1287ab4e753dcf68..bb6fcdbd7b4d358bb02ba8d2b63e38f5e16568b9 100644
--- a/paddle/fluid/framework/device_worker.h
+++ b/paddle/fluid/framework/device_worker.h
@@ -39,12 +39,11 @@ namespace framework {
 
 class PullDenseWorker {
  public:
-  PullDenseWorker() {}
   virtual ~PullDenseWorker() {}
   virtual void Initialize(const TrainerDesc& param);
   int Start();
   void Stop();
-  void SetScope(Scope* scope) { root_scope_ = scope; }
+  void SetRootScope(Scope* scope) { root_scope_ = scope; }
   void IncreaseThreadVersion(int thread_id, uint64_t table_id);
   void ResetThreadVersion(uint64_t table_id);
   void Wait(std::vector<::std::future<int32_t>>* status_vec);
@@ -57,6 +56,7 @@ class PullDenseWorker {
   }
 
  private:
+  PullDenseWorker() : root_scope_(NULL) {}
   void Run();
   bool CheckUpdateParam(uint64_t table_id);
 
@@ -137,20 +137,18 @@ class HogwildWorker : public CPUWorkerBase {
  protected:
   void CreateThreadOperators(const ProgramDesc& program);
   void CreateThreadScope(const ProgramDesc& program);
-  std::shared_ptr<DataFeed> thread_reader_;
   std::vector<std::string> op_names_;
   std::vector<OperatorBase*> ops_;
   Scope* thread_scope_;
   std::vector<std::string> fetch_var_names_;
   std::vector<std::vector<float>> fetch_values_;
-  platform::Place place_;
 };
 
 class DownpourWorker : public HogwildWorker {
  public:
   DownpourWorker() {}
   virtual ~DownpourWorker() {}
-  virtual void Initilize(const TrainerDesc& desc);
+  virtual void Initialize(const TrainerDesc& desc);
   virtual void TrainFiles();
 
  protected:
@@ -163,7 +161,7 @@ class DownpourWorker : public HogwildWorker {
  private:
   DownpourWorkerParameter param_;
   // just save the value in param_ for easy access
-  std::string label_var_name_;
+  std::map<uint64_t, std::string> label_var_name_;
   std::map<uint64_t, std::vector<std::string>> sparse_key_names_;
   std::map<uint64_t, std::vector<std::string>> sparse_value_names_;
   std::map<uint64_t, std::vector<std::string>> sparse_grad_names_;
diff --git a/paddle/fluid/framework/device_worker_factory.cc b/paddle/fluid/framework/device_worker_factory.cc
index fadd93e4af0760f5eebfca46d2dd1ee305e4d977..7492ae041c03d15ec743e37fedaa520b97fc197c 100644
--- a/paddle/fluid/framework/device_worker_factory.cc
+++ b/paddle/fluid/framework/device_worker_factory.cc
@@ -19,25 +19,6 @@ limitations under the License. */
 
 namespace paddle {
 namespace framework {
-typedef std::shared_ptr<DeviceWorker> (*Createdevice_workerFunction)();
-typedef std::unordered_map<std::string, Createdevice_workerFunction>
-    device_workerMap;
-device_workerMap g_device_worker_map;
-
-#define REGISTER_DEVICE_WORKER_CLASS(device_worker_class)                \
-  namespace {                                                            \
-  std::shared_ptr<DeviceWorker> Creator_##device_worker_class() {        \
-    return std::shared_ptr<DeviceWorker>(new device_worker_class);       \
-  }                                                                      \
-  class __Registerer_##device_worker_class {                             \
-   public:                                                               \
-    __Registerer_##device_worker_class() {                               \
-      g_device_worker_map[#device_worker_class] =                        \
-          &Creator_##device_worker_class;                                \
-    }                                                                    \
-  };                                                                     \
-  __Registerer_##device_worker_class g_registerer_##device_worker_class; \
-  }  // namespace
 
 std::string DeviceWorkerFactory::DeviceWorkerTypeList() {
   std::string device_worker_types;
@@ -59,7 +40,5 @@ std::shared_ptr<DeviceWorker> DeviceWorkerFactory::CreateDeviceWorker(
   return g_device_worker_map[device_worker_class]();
 }
 
-REGISTER_DEVICE_WORKER_CLASS(HogwildWorker);
-REGISTER_DEVICE_WORKER_CLASS(DownpourWorker);
 }  // namespace framework
 }  // namespace paddle
diff --git a/paddle/fluid/framework/device_worker_factory.h b/paddle/fluid/framework/device_worker_factory.h
new file mode 100644
index 0000000000000000000000000000000000000000..9b16d610998fd02486ffa447cbb921cd07f7c65f
--- /dev/null
+++ b/paddle/fluid/framework/device_worker_factory.h
@@ -0,0 +1,50 @@
+/* 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 <memory>
+#include <string>
+#include "paddle/fluid/framework/device_worker.h"
+
+namespace paddle {
+namespace framework {
+
+typedef std::shared_ptr<DeviceWorker> (*Createdevice_workerFunction)();
+typedef std::unordered_map<std::string, Createdevice_workerFunction>
+    device_workerMap;
+device_workerMap g_device_worker_map;
+#define REGISTER_DEVICE_WORKER_CLASS(device_worker_class)                \
+  namespace {                                                            \
+  std::shared_ptr<DeviceWorker> Creator_##device_worker_class() {        \
+    return std::shared_ptr<DeviceWorker>(new device_worker_class);       \
+  }                                                                      \
+  class __Registerer_##device_worker_class {                             \
+   public:                                                               \
+    __Registerer_##device_worker_class() {                               \
+      g_device_worker_map[#device_worker_class] =                        \
+          &Creator_##device_worker_class;                                \
+    }                                                                    \
+  };                                                                     \
+  __Registerer_##device_worker_class g_registerer_##device_worker_class; \
+  }  // namespace
+
+class DeviceWorkerFactory {
+ public:
+  static std::string DeviceWorkerTypeList();
+  static std::shared_ptr<DeviceWorker> CreateDeviceWorker(
+      std::string device_worker_class);
+};
+}  // namespace framework
+}  // namespace paddle
diff --git a/paddle/fluid/framework/dist_multi_trainer.cc b/paddle/fluid/framework/dist_multi_trainer.cc
index 76ddb77765ac083627674f649c5243f85a6b628b..646409d521d0472b3466a46f8a59f59c26eb5568 100644
--- a/paddle/fluid/framework/dist_multi_trainer.cc
+++ b/paddle/fluid/framework/dist_multi_trainer.cc
@@ -17,6 +17,7 @@ limitations under the License. */
 #include "paddle/fluid/framework/data_feed_factory.h"
 #include "paddle/fluid/framework/device_worker_factory.h"
 #include "paddle/fluid/framework/trainer.h"
+#include "paddle/fluid/framework/trainer_factory.h"
 
 namespace paddle {
 namespace framework {
@@ -34,6 +35,7 @@ void DistMultiTrainer::Initialize(const TrainerDesc& trainer_desc) {
     workers_[i]->SetDeviceIndex(i);
     readers_[i]->Init(trainer_desc.data_desc());
     workers_[i]->SetDataFeed(readers_[i]);
+    workers_[i]->Initialize(trainer_desc);
   }
 
   std::vector<std::string> filelist_vec;
@@ -41,13 +43,15 @@ void DistMultiTrainer::Initialize(const TrainerDesc& trainer_desc) {
     filelist_vec.push_back(trainer_desc.filelist(i));
   }
 
+  readers_[0]->SetFileList(filelist_vec);
+
   fleet_ptr_ = FleetWrapper::GetInstance();
   pull_dense_worker_ = PullDenseWorker::GetInstance();
   pull_dense_worker_->Initialize(trainer_desc);
 }
 
 void DistMultiTrainer::InitOtherEnv(const ProgramDesc& main_program) {
-  pull_dense_worker_->SetScope(root_scope_);
+  pull_dense_worker_->SetRootScope(root_scope_);
   pull_dense_worker_->Start();
 }
 
@@ -58,5 +62,6 @@ void DistMultiTrainer::Finalize() {
   pull_dense_worker_->Stop();
 }
 
+REGISTER_TRAINER_CLASS(DistMultiTrainer);
 }  // end namespace framework
 }  // end namespace paddle
diff --git a/paddle/fluid/framework/downpour_worker.cc b/paddle/fluid/framework/downpour_worker.cc
index d1d27ce149b691a81766d32da6286356e4a51c27..f790fc7d6959e1139d33d0b23784aa35f2232f10 100644
--- a/paddle/fluid/framework/downpour_worker.cc
+++ b/paddle/fluid/framework/downpour_worker.cc
@@ -1,4 +1,4 @@
-/* Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
+/* 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.
@@ -13,14 +13,14 @@ See the License for the specific language governing permissions and
 limitations under the License. */
 
 #include "paddle/fluid/framework/device_worker.h"
+#include "paddle/fluid/framework/device_worker_factory.h"
 #include "paddle/fluid/platform/cpu_helper.h"
 
 namespace paddle {
 namespace framework {
 
-void DownpourWorker::Initilize(const TrainerDesc& desc) {
+void DownpourWorker::Initialize(const TrainerDesc& desc) {
   param_ = desc.downpour_param();
-
   for (size_t i = 0; i < param_.sparse_table_size(); ++i) {
     uint64_t table_id =
         static_cast<uint64_t>(param_.sparse_table(i).table_id());
@@ -37,6 +37,7 @@ void DownpourWorker::Initilize(const TrainerDesc& desc) {
     for (size_t j = 0; j < table.sparse_grad_name_size(); ++j) {
       sparse_grad_names_[table_id][j] = table.sparse_grad_name(j);
     }
+    label_var_name_[table_id] = table.label_var_name();
   }
 
   for (size_t i = 0; i < param_.dense_table_size(); ++i) {
@@ -56,15 +57,18 @@ void DownpourWorker::Initilize(const TrainerDesc& desc) {
   for (size_t i = 0; i < param_.skip_ops_size(); ++i) {
     skip_ops_[i] = param_.skip_ops(i);
   }
-
-  label_var_name_ = param_.label_var_name();
+  skip_ops_.resize(param_.skip_ops_size());
 }
 
-void DownpourWorker::CollectLabelInfo(size_t table_id) {
+void DownpourWorker::CollectLabelInfo(size_t table_idx) {
+  auto table = param_.sparse_table(table_idx);
+  uint64_t table_id =
+      static_cast<uint64_t>(param_.sparse_table(table_idx).table_id());
+
   auto& feature = features_[table_id];
   auto& feature_label = feature_labels_[table_id];
   feature_label.resize(feature.size());
-  Variable* var = thread_scope_->FindVar(label_var_name_);
+  Variable* var = thread_scope_->FindVar(label_var_name_[table_id]);
   LoDTensor* tensor = var->GetMutable<LoDTensor>();
   int64_t* label_ptr = tensor->data<int64_t>();
 
@@ -75,13 +79,14 @@ void DownpourWorker::CollectLabelInfo(size_t table_id) {
     int64_t* ids = tensor->data<int64_t>();
     int fea_idx = 0;
     // tensor->lod()[0].size() == batch_size + 1
-    for (auto ins_idx = 0u; ins_idx < tensor->lod()[0].size() - 1; ++ins_idx) {
-      for (; fea_idx < tensor->lod()[0][ins_idx]; ++fea_idx) {
+    for (auto lod_idx = 1u; lod_idx < tensor->lod()[0].size(); ++lod_idx) {
+      for (; fea_idx < tensor->lod()[0][lod_idx]; ++fea_idx) {
         // should be skipped feasign defined in protobuf
         if (ids[fea_idx] == 0u) {
           continue;
         }
-        feature_label[global_index++] = static_cast<float>(label_ptr[ins_idx]);
+        feature_label[global_index++] =
+            static_cast<float>(label_ptr[lod_idx - 1]);
       }
     }
   }
@@ -128,10 +133,10 @@ void DownpourWorker::FillSparseValue(size_t table_idx) {
 
 void DownpourWorker::TrainFiles() {
   platform::SetNumThreads(1);
-  thread_reader_->Start();
+  device_reader_->Start();
   int batch_cnt = 0;
   int cur_batch;
-  while ((cur_batch = thread_reader_->Next()) > 0) {
+  while ((cur_batch = device_reader_->Next()) > 0) {
     // pull sparse here
     for (size_t i = 0; i < param_.sparse_table_size(); ++i) {
       uint64_t tid = static_cast<uint64_t>(param_.sparse_table(i).table_id());
@@ -144,7 +149,16 @@ void DownpourWorker::TrainFiles() {
 
     // do computation here
     for (auto& op : ops_) {
-      op->Run(*thread_scope_, place_);
+      bool need_skip = false;
+      for (auto t = 0u; t < skip_ops_.size(); ++t) {
+        if (op->Type().find(skip_ops_[t]) != std::string::npos) {
+          need_skip = true;
+          break;
+        }
+      }
+      if (!need_skip) {
+        op->Run(*thread_scope_, place_);
+      }
     }
 
     // push gradients here
@@ -198,10 +212,12 @@ void DownpourWorker::TrainFiles() {
       uint64_t tid = static_cast<uint64_t>(param_.dense_table(i).table_id());
       pull_dense_worker_->IncreaseThreadVersion(thread_id_, tid);
     }
+
     thread_scope_->DropKids();
     ++batch_cnt;
   }
 }
 
+REGISTER_DEVICE_WORKER_CLASS(DownpourWorker);
 }  // end namespace framework
 }  // end namespace paddle
diff --git a/paddle/fluid/framework/fleet/CMakeLists.txt b/paddle/fluid/framework/fleet/CMakeLists.txt
index 1457ac5d7f23543aaf7650f0d07f60f6a8c5a1e5..58881b80c7fdec994d72cbd7a8d3f078fbf52cea 100644
--- a/paddle/fluid/framework/fleet/CMakeLists.txt
+++ b/paddle/fluid/framework/fleet/CMakeLists.txt
@@ -1 +1 @@
-cc_library(fleet_wrapper SRCS fleet_wrapper.cc)
+cc_library(fleet_wrapper SRCS fleet_wrapper.cc DEPS pslib_brpc pslib)
diff --git a/paddle/fluid/framework/fleet/fleet_wrapper.cc b/paddle/fluid/framework/fleet/fleet_wrapper.cc
index 1955dc2c363c8af6eab93c7a2ebc3e3e89b4fe02..9bc0029d08d4aa9ee57b3448ad813c304563bca7 100644
--- a/paddle/fluid/framework/fleet/fleet_wrapper.cc
+++ b/paddle/fluid/framework/fleet/fleet_wrapper.cc
@@ -1,3 +1,17 @@
+// 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.
+
 /* Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
 
 Licensed under the Apache License, Version 2.0 (the "License");
@@ -19,10 +33,16 @@ namespace framework {
 
 const uint32_t MAX_FEASIGN_NUM = 1024 * 100 * 100;
 std::shared_ptr<FleetWrapper> FleetWrapper::s_instance_ = NULL;
+bool FleetWrapper::is_initialized_ = false;
+
+#ifdef PADDLE_WITH_PSLIB
+std::shared_ptr<paddle::distributed::PSlib> FleetWrapper::pslib_ptr_ = NULL;
+#endif
 
 void FleetWrapper::InitServer(const std::string& dist_desc, int index) {
 #ifdef PADDLE_WITH_PSLIB
   if (!is_initialized_) {
+    LOG(WARNING) << "Going to init server";
     pslib_ptr_ = std::shared_ptr<paddle::distributed::PSlib>(
         new paddle::distributed::PSlib());
     pslib_ptr_->init_server(dist_desc, index);
@@ -38,6 +58,7 @@ void FleetWrapper::InitWorker(const std::string& dist_desc,
                               int node_num, int index) {
 #ifdef PADDLE_WITH_PSLIB
   if (!is_initialized_) {
+    LOG(WARNING) << "Going to init server";
     pslib_ptr_ = std::shared_ptr<paddle::distributed::PSlib>(
         new paddle::distributed::PSlib());
     pslib_ptr_->init_worker(dist_desc,
@@ -52,12 +73,14 @@ void FleetWrapper::InitWorker(const std::string& dist_desc,
 
 void FleetWrapper::StopServer() {
 #ifdef PADDLE_WITH_PSLIB
+  LOG(WARNING) << "Going to stop server";
   pslib_ptr_->stop_server();
 #endif
 }
 
 uint64_t FleetWrapper::RunServer() {
 #ifdef PADDLE_WITH_PSLIB
+  LOG(WARNING) << "Going to run server";
   return pslib_ptr_->run_server();
 #else
   return 0;
@@ -67,6 +90,7 @@ uint64_t FleetWrapper::RunServer() {
 void FleetWrapper::GatherServers(const std::vector<uint64_t>& host_sign_list,
                                  int node_num) {
 #ifdef PADDLE_WITH_PSLIB
+  LOG(WARNING) << "Going to gather server ips";
   pslib_ptr_->gather_servers(const_cast<uint64_t*>(host_sign_list.data()),
                              node_num);
 #endif
@@ -122,13 +146,13 @@ void FleetWrapper::PullDenseVarsAsync(
     std::vector<::std::future<int32_t>>* pull_dense_status) {
 #ifdef PADDLE_WITH_PSLIB
   std::vector<paddle::ps::Region> regions;
-  regions.reserve(var_names.size());
-  for (auto& t : var_names) {
-    Variable* var = scope.FindVar(t);
+  regions.resize(var_names.size());
+  for (auto i = 0u; i < var_names.size(); ++i) {
+    Variable* var = scope.FindVar(var_names[i]);
     LoDTensor* tensor = var->GetMutable<LoDTensor>();
     float* w = tensor->data<float>();
     paddle::ps::Region reg(w, tensor->numel());
-    regions.emplace_back(std::move(reg));
+    regions[i] = std::move(reg);
   }
   auto status =
       pslib_ptr_->_worker_ptr->pull_dense(regions.data(), regions.size(), tid);
@@ -186,7 +210,10 @@ void FleetWrapper::PushSparseVarsWithLabelAsync(
   int offset = 2;
   uint64_t fea_idx = 0u;
   for (size_t i = 0; i < sparse_key_names.size(); ++i) {
-    Variable* g_var = scope.FindVar(sparse_key_names[i]);
+    LOG(WARNING) << "sparse key names[" << i << "]: " << sparse_key_names[i];
+    LOG(WARNING) << "sparse grad names[" << i << "]: " << sparse_grad_names[i];
+    Variable* g_var = scope.FindVar(sparse_grad_names[i]);
+    CHECK(g_var != nullptr) << "var[" << sparse_grad_names[i] << "] not found";
     LoDTensor* g_tensor = g_var->GetMutable<LoDTensor>();
     if (g_tensor == NULL) {
       LOG(ERROR) << "var[" << sparse_key_names[i] << "] not found";
@@ -201,16 +228,26 @@ void FleetWrapper::PushSparseVarsWithLabelAsync(
       exit(-1);
     }
     int len = tensor->numel();
+    LOG(WARNING) << " tensor len: " << len;
     int64_t* ids = tensor->data<int64_t>();
+    push_values->resize(fea_keys.size() + 1);
+    for (auto& t : *push_values) {
+      t.resize(emb_dim + offset);
+    }
+
     for (auto id_idx = 0u; id_idx < len; ++id_idx) {
       if (ids[id_idx] == 0) {
         g += emb_dim;
         continue;
       }
+      LOG(WARNING) << "going to memcpy";
       memcpy((*push_values)[fea_idx].data() + offset, g,
              sizeof(float) * emb_dim);
+      LOG(WARNING) << "show";
       (*push_values)[fea_idx][0] = 1.0f;
+      LOG(WARNING) << "click";
       (*push_values)[fea_idx][1] = static_cast<float>(fea_labels[fea_idx]);
+      LOG(WARNING) << "offset";
       g += emb_dim;
       fea_idx++;
     }
diff --git a/paddle/fluid/framework/fleet/fleet_wrapper.h b/paddle/fluid/framework/fleet/fleet_wrapper.h
index 82c19f5dfb18d23d3758427acb3b4c75554bc114..945600daff0368ecf0e810ea20bd9c301c5c1e0b 100644
--- a/paddle/fluid/framework/fleet/fleet_wrapper.h
+++ b/paddle/fluid/framework/fleet/fleet_wrapper.h
@@ -47,7 +47,6 @@ namespace framework {
 
 class FleetWrapper {
  public:
-  FleetWrapper() {}
   virtual ~FleetWrapper() {}
 
   // Pull sparse variables from server in Sync mode
@@ -122,8 +121,11 @@ class FleetWrapper {
   static std::shared_ptr<paddle::distributed::PSlib> pslib_ptr_;
 #endif
 
+ private:
+  FleetWrapper() {}
+
  protected:
-  bool is_initialized_;
+  static bool is_initialized_;
   DISABLE_COPY_AND_ASSIGN(FleetWrapper);
 };
 
diff --git a/paddle/fluid/framework/hogwild_worker.cc b/paddle/fluid/framework/hogwild_worker.cc
index 4bcc89942e89fc5db8aa98204b2f0debb6f01c04..a9c23fd63c0933ad4b1d8b91142a721f75bd5f1b 100644
--- a/paddle/fluid/framework/hogwild_worker.cc
+++ b/paddle/fluid/framework/hogwild_worker.cc
@@ -13,6 +13,7 @@ See the License for the specific language governing permissions and
 limitations under the License. */
 
 #include "paddle/fluid/framework/device_worker.h"
+#include "paddle/fluid/framework/device_worker_factory.h"
 #include "paddle/fluid/platform/cpu_helper.h"
 
 namespace paddle {
@@ -50,9 +51,9 @@ void HogwildWorker::CreateThreadScope(const ProgramDesc& program) {
 
 void HogwildWorker::BindingDataFeedMemory() {
   const std::vector<std::string>& input_feed =
-      thread_reader_->GetUseSlotAlias();
+      device_reader_->GetUseSlotAlias();
   for (auto name : input_feed) {
-    thread_reader_->AddFeedVar(thread_scope_->Var(name), name);
+    device_reader_->AddFeedVar(thread_scope_->Var(name), name);
   }
 }
 
@@ -63,7 +64,7 @@ void HogwildWorker::CreateDeviceResource(const ProgramDesc& main_prog) {
 
 void HogwildWorker::TrainFilesWithProfiler() {
   platform::SetNumThreads(1);
-  thread_reader_->Start();
+  device_reader_->Start();
   std::vector<double> op_total_time;
   std::vector<std::string> op_name;
   for (auto& op : ops_) {
@@ -79,7 +80,7 @@ void HogwildWorker::TrainFilesWithProfiler() {
   int cur_batch;
   int batch_cnt = 0;
   timeline.Start();
-  while ((cur_batch = thread_reader_->Next()) > 0) {
+  while ((cur_batch = device_reader_->Next()) > 0) {
     timeline.Pause();
     read_time += timeline.ElapsedSec();
     total_time += timeline.ElapsedSec();
@@ -115,10 +116,10 @@ void HogwildWorker::TrainFiles() {
   platform::SetNumThreads(1);
 
   // how to accumulate fetched values here
-  thread_reader_->Start();
+  device_reader_->Start();
   int cur_batch;
   int batch_cnt = 0;
-  while ((cur_batch = thread_reader_->Next()) > 0) {
+  while ((cur_batch = device_reader_->Next()) > 0) {
     for (auto& op : ops_) {
       op->Run(*thread_scope_, place_);
     }
@@ -128,5 +129,6 @@ void HogwildWorker::TrainFiles() {
   }
 }
 
+REGISTER_DEVICE_WORKER_CLASS(HogwildWorker);
 }  // end namespace framework
 }  // end namespace paddle
diff --git a/paddle/fluid/framework/multi_trainer.cc b/paddle/fluid/framework/multi_trainer.cc
index 969d27c8efe5be002acd15f5e432cbb431cc4fc0..b8e2f0aff1ef56422676ad1396cdccc297b3eb12 100644
--- a/paddle/fluid/framework/multi_trainer.cc
+++ b/paddle/fluid/framework/multi_trainer.cc
@@ -17,6 +17,7 @@ limitations under the License. */
 #include "paddle/fluid/framework/data_feed_factory.h"
 #include "paddle/fluid/framework/device_worker_factory.h"
 #include "paddle/fluid/framework/trainer.h"
+#include "paddle/fluid/framework/trainer_factory.h"
 
 namespace paddle {
 namespace framework {
@@ -65,5 +66,6 @@ void MultiTrainer::Finalize() {
   }
 }
 
+REGISTER_TRAINER_CLASS(MultiTrainer);
 }  // end namespace framework
 }  // end namespace paddle
diff --git a/paddle/fluid/framework/pull_dense_worker.cc b/paddle/fluid/framework/pull_dense_worker.cc
index 04b6d4c4320eb9965c780296d731d1b99ff7f6dd..7d94b5254d9dba53b591572677660e9d9eaf937b 100644
--- a/paddle/fluid/framework/pull_dense_worker.cc
+++ b/paddle/fluid/framework/pull_dense_worker.cc
@@ -20,24 +20,31 @@ namespace framework {
 std::shared_ptr<PullDenseWorker> PullDenseWorker::s_instance_ = NULL;
 
 void PullDenseWorker::Initialize(const TrainerDesc& param) {
+  LOG(WARNING) << "going to initialize pull dense worker";
   running_ = false;
   param_ = param.pull_dense_param();
   threshold_ = param_.threshold();
   thread_num_ = param_.device_num();
   sleep_time_ms_ = param_.sleep_time_ms();
+  LOG(WARNING) << "dense table size: " << param_.dense_table_size();
+  LOG(WARNING) << "thread num: " << thread_num_;
   for (size_t i = 0; i < param_.dense_table_size(); ++i) {
     // setup dense variables for each table
     int var_num = param_.dense_table(i).dense_value_name_size();
+    LOG(WARNING) << "var num: " << var_num;
     uint64_t tid = static_cast<uint64_t>(param_.dense_table(i).table_id());
     dense_value_names_[tid].resize(var_num);
     for (int j = 0; j < var_num; ++j) {
       dense_value_names_[tid][j] = param_.dense_table(i).dense_value_name(j);
+      LOG(WARNING) << "dense value names " << j << " "
+                   << dense_value_names_[tid][j];
     }
     // setup training version for each table
     training_versions_[tid].resize(thread_num_, 0);
     last_versions_[tid] = 0;
     current_version_[tid] = 0;
   }
+  LOG(WARNING) << "initialize pull dense worker done.";
 }
 
 void PullDenseWorker::Wait(std::vector<::std::future<int32_t>>* status_vec) {
@@ -56,6 +63,7 @@ void PullDenseWorker::Wait(std::vector<::std::future<int32_t>>* status_vec) {
                << " Times";
     exit(-1);
   }
+  status_vec->resize(0);
 }
 
 void PullDenseWorker::Stop() {
@@ -90,7 +98,10 @@ void PullDenseWorker::Run() {
 }
 
 void PullDenseWorker::IncreaseThreadVersion(int thread_id, uint64_t table_id) {
+  LOG(WARNING) << "increase thread version input: " << thread_id << " table id "
+               << table_id;
   std::lock_guard<std::mutex> lock(mutex_for_version_);
+  LOG(WARNING) << "going to increase";
   training_versions_[table_id][thread_id]++;
 }
 
diff --git a/paddle/fluid/framework/trainer.cc b/paddle/fluid/framework/trainer.cc
index d3bdceffffec615a2293201b5ec75f985c289cd2..644bd33a1420aa0ff54e34005eedd10c28342665 100644
--- a/paddle/fluid/framework/trainer.cc
+++ b/paddle/fluid/framework/trainer.cc
@@ -19,7 +19,5 @@ namespace framework {
 
 void TrainerBase::SetScope(Scope* root_scope) { root_scope_ = root_scope; }
 
-void TrainerBase::Initialize(const TrainerDesc& trainer_desc) { return; }
-
 }  // end namespace framework
 }  // end namespace paddle
diff --git a/paddle/fluid/framework/trainer.h b/paddle/fluid/framework/trainer.h
index 283875940fcf14c215d7bc2bc1ab105c7f6553cc..e1602f6c8ce461b2f15c36b96c491c7e9b4e2d0d 100644
--- a/paddle/fluid/framework/trainer.h
+++ b/paddle/fluid/framework/trainer.h
@@ -39,8 +39,8 @@ class TrainerBase {
   virtual ~TrainerBase() {}
   // model memory are hosted in root_scope
   void SetScope(Scope* root_scope);
-  void Initialize(const TrainerDesc& trainer_desc);
   void SetDebug(const bool debug) { debug_ = debug; }
+  virtual void Initialize(const TrainerDesc& trainer_desc) = 0;
   virtual void InitTrainerEnv(const ProgramDesc& main_program,
                               const platform::Place& place) = 0;
   virtual void InitOtherEnv(const ProgramDesc& main_program) = 0;
diff --git a/paddle/fluid/framework/trainer_desc.proto b/paddle/fluid/framework/trainer_desc.proto
index a3054b61b0781b8d2c64bfd0ac25838b12a5a9e7..035cdb3d80862e85612f8775a77f5649dc85bdfc 100644
--- a/paddle/fluid/framework/trainer_desc.proto
+++ b/paddle/fluid/framework/trainer_desc.proto
@@ -43,7 +43,6 @@ message DownpourWorkerParameter {
   repeated TableParameter sparse_table = 1;
   repeated TableParameter dense_table = 2;
   repeated string skip_ops = 3;
-  optional string label_var_name = 4;
 }
 
 message PullDenseWorkerParameter {
diff --git a/paddle/fluid/framework/trainer_factory.cc b/paddle/fluid/framework/trainer_factory.cc
index 489b9eddb56ad9775bfb09e9c14482e485eb6b01..a499440f7327f797fc56f32dee8e23f2c95cfeb2 100644
--- a/paddle/fluid/framework/trainer_factory.cc
+++ b/paddle/fluid/framework/trainer_factory.cc
@@ -21,23 +21,6 @@ limitations under the License. */
 
 namespace paddle {
 namespace framework {
-typedef std::shared_ptr<TrainerBase> (*CreatetrainerFunction)();
-typedef std::unordered_map<std::string, CreatetrainerFunction> trainerMap;
-trainerMap g_trainer_map;
-
-#define REGISTER_TRAINER_CLASS(trainer_class)                   \
-  namespace {                                                   \
-  std::shared_ptr<TrainerBase> Creator_##trainer_class() {      \
-    return std::shared_ptr<TrainerBase>(new trainer_class);     \
-  }                                                             \
-  class __Registerer_##trainer_class {                          \
-   public:                                                      \
-    __Registerer_##trainer_class() {                            \
-      g_trainer_map[#trainer_class] = &Creator_##trainer_class; \
-    }                                                           \
-  };                                                            \
-  __Registerer_##trainer_class g_registerer_##trainer_class;    \
-  }  // namespace
 
 std::string TrainerFactory::TrainerTypeList() {
   std::string trainer_types;
@@ -58,7 +41,5 @@ std::shared_ptr<TrainerBase> TrainerFactory::CreateTrainer(
   return g_trainer_map[trainer_class]();
 }
 
-REGISTER_TRAINER_CLASS(MultiTrainer);
-REGISTER_TRAINER_CLASS(DistMultiTrainer);
 }  // namespace framework
 }  // namespace paddle
diff --git a/paddle/fluid/framework/trainer_factory.h b/paddle/fluid/framework/trainer_factory.h
new file mode 100644
index 0000000000000000000000000000000000000000..273cd119cb99f1d737740f4acaeac52a755f96c3
--- /dev/null
+++ b/paddle/fluid/framework/trainer_factory.h
@@ -0,0 +1,47 @@
+/* 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 <memory>
+#include <string>
+#include "paddle/fluid/framework/trainer.h"
+
+namespace paddle {
+namespace framework {
+typedef std::shared_ptr<TrainerBase> (*CreatetrainerFunction)();
+typedef std::unordered_map<std::string, CreatetrainerFunction> trainerMap;
+trainerMap g_trainer_map;
+
+#define REGISTER_TRAINER_CLASS(trainer_class)                   \
+  namespace {                                                   \
+  std::shared_ptr<TrainerBase> Creator_##trainer_class() {      \
+    return std::shared_ptr<TrainerBase>(new trainer_class);     \
+  }                                                             \
+  class __Registerer_##trainer_class {                          \
+   public:                                                      \
+    __Registerer_##trainer_class() {                            \
+      g_trainer_map[#trainer_class] = &Creator_##trainer_class; \
+    }                                                           \
+  };                                                            \
+  __Registerer_##trainer_class g_registerer_##trainer_class;    \
+  }  // namespace
+
+class TrainerFactory {
+ public:
+  static std::string TrainerTypeList();
+  static std::shared_ptr<TrainerBase> CreateTrainer(std::string trainer_class);
+};
+}  // namespace framework
+}  // namespace paddle
diff --git a/python/paddle/fluid/async_executor.py b/python/paddle/fluid/async_executor.py
index 7068f51331b2633ca36347d3446d87830e1483ce..61de5ade86175f3229035b5e6a13c981c696bd80 100644
--- a/python/paddle/fluid/async_executor.py
+++ b/python/paddle/fluid/async_executor.py
@@ -110,15 +110,17 @@ class AsyncExecutor(object):
         is_local = self.instance == None
         trainer = None
         if is_local:
-            trainer = MultiTrainer(data_feed=data_feed, worker="Hogwild")
+            trainer = MultiTrainer()
         else:
-            trainer = DistMultiTrainer(
-                data_feed, worker="Downpour", fleet_desc=self.dist_desc)
-
-        # define a trainer and a device_worker here
+            trainer = DistMultiTrainer()
+        trainer.gen_trainer_desc(
+            dataset=data_feed, fleet_desc=self.dist_desc, worker="downpour")
         trainer.set_thread(thread_num)
         trainer.set_filelist(filelist)
         trainer.set_data_feed(data_feed)
+        with open("trainer_desc.proto", "w") as fout:
+            fout.write(trainer._desc())
+        # define a trainer and a device_worker here
         self.executor.run_from_files(program_desc, trainer._desc(), debug)
 
     '''
@@ -284,8 +286,9 @@ class AsyncExecutor(object):
             raise ValueError(
                 'instance is None, please run config_distributed_nodes init instance'
             )
-        self.init_desc = init_desc
-        self.executor.init_server(dist_desc, self.instance._rankid)
+        self.dist_desc_str = text_format.MessageToString(dist_desc)
+        self.dist_desc = dist_desc
+        self.executor.init_server(self.dist_desc_str, self.instance._rankid)
         ip = self.executor.start_server()
         self.instance.set_ip(ip)
         self.instance.barrier_all()  #wait all server start
@@ -306,6 +309,7 @@ class AsyncExecutor(object):
                 'instance is None, please run config_distributed_nodes init instance'
             )
 
+        self.dist_desc_str = text_format.MessageToString(dist_desc)
         self.dist_desc = dist_desc
         place = core.CPUPlace()
         executor = Executor(place)
@@ -313,7 +317,7 @@ class AsyncExecutor(object):
 
         self.instance.barrier_all()  #wait all server start
         ips = self.instance.gather_ips()
-        self.executor.init_worker(dist_desc, ips,
+        self.executor.init_worker(self.dist_desc_str, ips,
                                   self.instance.get_node_cnt(),
                                   self.instance._rankid)
         self.instance.barrier_all()  #wait all worker start
diff --git a/python/paddle/fluid/device_worker.py b/python/paddle/fluid/device_worker.py
new file mode 100644
index 0000000000000000000000000000000000000000..71f250f742d3e12fe8afebe6b111216fecff5965
--- /dev/null
+++ b/python/paddle/fluid/device_worker.py
@@ -0,0 +1,75 @@
+#   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.
+
+
+class DeviceWorker(object):
+    def __init__(self):
+        pass
+
+    def gen_worker_desc(self, trainer_desc, fleet_desc):
+        pass
+
+
+class Hogwild(DeviceWorker):
+    def __init__(self):
+        super(Hogwild, self).__init__()
+
+    def gen_worker_desc(self, trainer_desc, fleet_desc):
+        trainer_desc.device_worker_name = "HogwildWorker"
+
+
+class Downpour(DeviceWorker):
+    def __init__(self):
+        super(Downpour, self).__init__()
+
+    def gen_worker_desc(self, trainer_desc, fleet_desc):
+        trainer_desc.device_worker_name = "DownpourWorker"
+        pull_thread = trainer_desc.pull_dense_param
+        pull_thread.device_num = trainer_desc.thread_num
+        dense_table = pull_thread.dense_table.add()
+        dense_table.dense_value_name.extend(
+            fleet_desc.trainer_param.dense_table[0].dense_variable_name)
+        dense_table.table_id = \
+                    fleet_desc.trainer_param.dense_table[0].table_id
+        downpour = trainer_desc.downpour_param
+        sparse_table = downpour.sparse_table.add()
+        sparse_table.table_id = \
+                    fleet_desc.trainer_param.sparse_table[0].table_id
+        sparse_table.sparse_key_name.extend(
+            fleet_desc.trainer_param.sparse_table[0].slot_key)
+        sparse_table.sparse_value_name.extend(
+            fleet_desc.trainer_param.sparse_table[0].slot_value)
+        sparse_table.sparse_grad_name.extend(
+            fleet_desc.trainer_param.sparse_table[0].slot_gradient)
+        sparse_table.emb_dim = fleet_desc.server_param.downpour_server_param.downpour_table_param[
+            0].accessor.fea_dim - 2
+        sparse_table.fea_dim = sparse_table.emb_dim + 2
+        sparse_table.label_var_name = "click"
+
+        dense_table = downpour.dense_table.add()
+        dense_table.table_id = \
+                    fleet_desc.trainer_param.dense_table[0].table_id
+        dense_table.dense_value_name.extend(
+            fleet_desc.trainer_param.dense_table[0].dense_variable_name)
+        dense_table.dense_grad_name.extend(fleet_desc.trainer_param.dense_table[
+            0].dense_gradient_variable_name)
+        downpour.skip_ops.extend(fleet_desc.trainer_param.skip_op)
+
+
+class DeviceWorkerFactory(object):
+    def create_device_worker(self, worker_type):
+        classname = worker_type.capitalize()
+        print("------------")
+        print(classname)
+        return globals()[classname]()
diff --git a/python/paddle/fluid/trainer_desc.py b/python/paddle/fluid/trainer_desc.py
index 85bfb0a4ee3a2d616608740e4e396dfb25148d0e..6e66706bb71a43bbc6ee7407821e8bd304ded24d 100644
--- a/python/paddle/fluid/trainer_desc.py
+++ b/python/paddle/fluid/trainer_desc.py
@@ -13,7 +13,8 @@
 # limitations under the License.
 
 from paddle.fluid.proto import trainer_desc_pb2
-import ps_pb2 as pslib
+from distributed import ps_pb2 as ps_pb2
+from device_worker import DeviceWorkerFactory
 from google.protobuf import text_format
 
 __all__ = ['TrainerDesc', 'MultiTrainer', 'DistMultiTrainer']
@@ -28,16 +29,22 @@ class TrainerDesc(object):
             text_format.Parse(f.read(), self.proto_desc)
         '''
         self.proto_desc = trainer_desc_pb2.TrainerDesc()
+        self.proto_desc.thread_num = 12
 
     def set_thread(self, thread_num):
         self.proto_desc.thread_num = thread_num
 
     def set_filelist(self, filelist):
         self.proto_desc.filelist.extend(filelist)
+        self.proto_desc.thread_num = min(
+            len(filelist), self.proto_desc.thread_num)
 
     def set_data_feed(self, datafeed):
         self.proto_desc.data_desc.CopyFrom(datafeed.proto_desc)
 
+    def gen_trainer_desc(self, dataset=None, fleet_desc=None, worker=None):
+        pass
+
     def _desc(self):
         return text_format.MessageToString(self.proto_desc)
 
@@ -52,41 +59,20 @@ class MultiTrainer(TrainerDesc):
             raise ValueError('ValueError: DeviceWorker %s '
                              'is not supported in MultiTrainer' % worker)
 
+    def gen_trainer_desc(self, dataset=None, fleet_desc=None, worker="Hogwild"):
+        super(MultiTrainer, self).gen_trainer_desc(fleet_desc, worker)
+
 
 class DistMultiTrainer(TrainerDesc):
-    def __init__(self, dataset=None, worker='Downpour', fleet_desc=None):
+    def __init__(self):
         super(DistMultiTrainer, self).__init__()
-        if worker == "Downpour":
-            self.proto_desc.device_worker_name = worker + "Worker"
-            self.proto_desc.class_name = "DistMultiTrainer"
-            self.proto_desc.data_feed.CopyFrom(dataset)
-            downpour = self.proto_desc.downpour_param.add()
-            # sparse table should specify:
-            sparse_table = downpour.sparse_table.add()
-            sparse_table.table_id = \
-                         fleet_desc.trainer_param.sparse_table.table_id
-            sparse_table.sparse_key_name.CopyFrom(fleet_desc.trainer_param()
-                                                  .sparse_table().slot_key())
-            sparse_table.sparse_value_name.CopyFrom(fleet_desc.trainer_param(
-            ).sparse_table().slot_value())
-            sparse_table.sparse_grad_name.CopyFrom(fleet_desc.trainer_param(
-            ).sparse_table().slot_gradient())
-            sparse_table.emb_dim = fleet_desc.server_param.downpour_server_param.downpour_table_param.accessor.fea_dim - 2
-            sparse_table.fea_dim = downpour.emb_dim + 2
-            sparse_table.label_var_name = "click"
+        pass
 
-            # dense table should specify:
-            dense_table = downpour.dense_table.add()
-            dense_table.table_id = \
-                        fleet_desc.trainer_param.dense_table.table_id
-            # dense_value_name
-            dense_table.dense_value_name.CopyFrom(fleet_desc.trainer_param(
-            ).dense_table().dense_variable_name)
-            # dense_grad_name
-            dense_table.dense_grad_name.CopyFrom(fleet_desc.trainer_param(
-            ).dense_table().dense_gradient_name)
-            downpour.skipped_ops.extend(fleet_desc.trainer_param.skip_op)
-            print(str(self.proto_desc))
-        else:
-            raise ValueError('ValueError: DeviceWorker %s '
-                             'is not supported in DistMultiTrainer' % worker)
+    def gen_trainer_desc(self, dataset=None, fleet_desc=None,
+                         worker="Downpour"):
+        super(DistMultiTrainer, self).gen_trainer_desc(fleet_desc, worker)
+        self.proto_desc.class_name = "DistMultiTrainer"
+        self.proto_desc.data_desc.CopyFrom(dataset.proto_desc)
+        worker_builder = DeviceWorkerFactory()
+        device_worker = worker_builder.create_device_worker("Downpour")
+        device_worker.gen_worker_desc(self.proto_desc, fleet_desc)