diff --git a/paddle/framework/attribute.cc b/paddle/framework/attribute.cc
index 29fe352ca450740e55ee87b63392e3aabac8aa40..b1e17936417e4ce09bace1d1a5d346d1c9cfa710 100644
--- a/paddle/framework/attribute.cc
+++ b/paddle/framework/attribute.cc
@@ -19,7 +19,7 @@ limitations under the License. */
 namespace paddle {
 namespace framework {
 
-Attribute GetAttrValue(const OpDesc::Attr& attr_desc, ProgramDesc* program) {
+Attribute GetAttrValue(const OpDesc::Attr& attr_desc) {
   switch (attr_desc.type()) {
     case framework::AttrType::BOOLEAN: {
       return attr_desc.b();
@@ -61,13 +61,9 @@ Attribute GetAttrValue(const OpDesc::Attr& attr_desc, ProgramDesc* program) {
       }
       return val;
     }
-    case framework::AttrType::BLOCK: {
-      PADDLE_ENFORCE(program != nullptr,
-                     "Need to specify ProgramDesc when get a block attr");
-      return program->mutable_blocks(attr_desc.block_idx());
-    }
+    default:
+      PADDLE_THROW("Unsupport attr type %d", attr_desc.type());
   }
-  PADDLE_ENFORCE(false, "Unknown OpDesc::AttrDesc::type !");
   return boost::blank();
 }
 
diff --git a/paddle/framework/attribute.h b/paddle/framework/attribute.h
index 9744662b8f7229b0b17e910ae5cd997fa7d31e06..0641907d6ff7546df1601d3b0263ff42f4186968 100644
--- a/paddle/framework/attribute.h
+++ b/paddle/framework/attribute.h
@@ -32,7 +32,7 @@ inline AttrType AttrTypeID() {
   return static_cast<AttrType>(tmp.which() - 1);
 }
 
-Attribute GetAttrValue(const OpDesc::Attr& attr_desc, ProgramDesc* desc);
+Attribute GetAttrValue(const OpDesc::Attr& attr_desc);
 
 class AttrReader {
  public:
diff --git a/paddle/framework/backward.cc b/paddle/framework/backward.cc
index 150c152367e1bcdc095bce6f77fafdef601e1c47..dbd5a14f9f3b681f0b77b9bd507b34edfaa78766 100644
--- a/paddle/framework/backward.cc
+++ b/paddle/framework/backward.cc
@@ -18,6 +18,7 @@
 #include <deque>
 #include <list>
 #include <memory>
+#include <unordered_set>
 
 #include "paddle/framework/block_desc.h"
 #include "paddle/framework/op_registry.h"
@@ -285,6 +286,15 @@ static bool AllGradInSet(const std::vector<std::string>& names,
   return true;
 }
 
+static std::string FwdName(const std::string& grad_name) {
+  auto pos = grad_name.find("@GRAD");
+  if (pos == std::string::npos) {
+    return "";
+  } else {
+    return grad_name.substr(0, pos);
+  }
+}
+
 static void CreateGradVarInBlock(
     size_t grad_op_start_index,
     const std::unordered_map<std::string, std::string>& param_name_map,
@@ -294,6 +304,7 @@ static void CreateGradVarInBlock(
   for (size_t op_index = grad_op_start_index; op_index < ops.size();
        ++op_index) {
     bool need_infer_shape = false;
+    std::unordered_set<std::string> new_vars;
     ForEachVarName(ops[op_index]->Outputs(),
                    [&](const std::string& grad_var_name) {
                      if (block_desc->HasVar(grad_var_name)) {
@@ -301,8 +312,7 @@ static void CreateGradVarInBlock(
                      }
                      need_infer_shape = true;
                      auto var = block_desc->Var(grad_var_name);
-                     // FIXME(qiao) infer the datatype
-                     var->SetDataType(framework::DataType::FP32);
+                     new_vars.insert(var->Name());
                      auto it = param_name_map.find(grad_var_name);
                      if (it == param_name_map.end()) {
                        return false;
@@ -316,6 +326,21 @@ static void CreateGradVarInBlock(
                    });
     if (need_infer_shape) {
       ops[op_index]->InferVarType(block_desc);
+      for (auto& arg : ops[op_index]->OutputArgumentNames()) {
+        if (new_vars.find(arg) == new_vars.end()) {
+          continue;
+        }
+        auto pname = FwdName(arg);
+        auto* param = block_desc->FindVar(pname);
+        auto* grad = block_desc->FindVar(arg);
+        if (param == nullptr) {
+          LOG(WARNING) << "Cannot find forward variable of " << arg
+                       << ". Set its gradient to FP32";
+          grad->SetDataType(DataType::FP32);
+        } else {
+          grad->SetDataType(param->GetDataType());
+        }
+      }
       ops[op_index]->InferShape(*block_desc);
     }
   }
@@ -368,7 +393,7 @@ std::vector<std::unique_ptr<OpDescBind>> MakeBlockBackward(
     ProgramDescBind& program_desc, int block_idx,
     std::unordered_set<std::string>* no_grad_vars,
     std::unordered_map<std::string, std::string>* grad_to_var) {
-  BlockDescBind* cur_block = program_desc.Block(block_idx);
+  BlockDescBind* cur_block = program_desc.MutableBlock(block_idx);
   std::vector<OpDescBind*> op_descs = cur_block->AllOps();
   std::unordered_map<std::string, std::vector<size_t>> dup_out_ops;
   size_t grad_desc_idx = 0;
@@ -443,7 +468,7 @@ ParamGradInfoMap AppendBackward(
   }
 
   const int root_block_idx = 0;
-  auto root_block = program_desc.Block(root_block_idx);
+  auto root_block = program_desc.MutableBlock(root_block_idx);
 
   // insert fill one op for target
   // TODO(qiao) add some check to the target.
@@ -492,7 +517,7 @@ ParamGradInfoMap AppendBackward(
   CreateGradVarInBlock(forward_op_num, grad_to_var, root_block, &retv);
   for (size_t block_index = forward_block_num;
        block_index < program_desc.Size(); ++block_index) {
-    CreateGradVarInBlock(0, grad_to_var, program_desc.Block(block_index),
+    CreateGradVarInBlock(0, grad_to_var, program_desc.MutableBlock(block_index),
                          &retv);
   }
   return retv;
diff --git a/paddle/framework/backward_test.cc b/paddle/framework/backward_test.cc
index 421f1321948235aa0c1acd2e24037b34716e449a..4e8d630c2634682ff63b38182108eadebb5c7ff9 100644
--- a/paddle/framework/backward_test.cc
+++ b/paddle/framework/backward_test.cc
@@ -499,7 +499,7 @@ TEST(Backward, linear_net_intermediate_variable_has_no_grad) {
 
 TEST(Backward, simple_single_op) {
   f::ProgramDescBind program;
-  f::BlockDescBind *block = program.Block(0);
+  f::BlockDescBind *block = program.MutableBlock(0);
 
   f::OpDescBind *op = block->AppendOp();
   op->SetType("rowwise_add");
@@ -535,7 +535,7 @@ TEST(Backward, simple_single_op) {
 
 TEST(Backward, default_attribute) {
   f::ProgramDescBind program;
-  f::BlockDescBind *block = program.Block(0);
+  f::BlockDescBind *block = program.MutableBlock(0);
   f::OpDescBind *op = block->AppendOp();
   op->SetType("mul");
   op->SetInput("X", {"x"});
@@ -561,7 +561,7 @@ TEST(Backward, default_attribute) {
 
 TEST(Backward, simple_mult_op) {
   f::ProgramDescBind program;
-  f::BlockDescBind *block = program.Block(0);
+  f::BlockDescBind *block = program.MutableBlock(0);
   f::OpDescBind *op1 = block->AppendOp();
   op1->SetType("rowwise_add");
   op1->SetInput("X", {"x1"});
@@ -644,7 +644,7 @@ TEST(Backward, simple_mult_op) {
 
 TEST(Backward, intermedia_var_no_grad) {
   f::ProgramDescBind program;
-  f::BlockDescBind *block = program.Block(0);
+  f::BlockDescBind *block = program.MutableBlock(0);
   f::OpDescBind *op1 = block->AppendOp();
   op1->SetType("rowwise_add");
   op1->SetInput("X", {"x1"});
@@ -714,7 +714,7 @@ TEST(Backward, intermedia_var_no_grad) {
 
 TEST(Backward, var_no_grad) {
   f::ProgramDescBind program;
-  f::BlockDescBind *block = program.Block(0);
+  f::BlockDescBind *block = program.MutableBlock(0);
   f::OpDescBind *op1 = block->AppendOp();
   op1->SetType("mult_in_out");
   op1->SetInput("X", {"x1"});
@@ -790,7 +790,7 @@ TEST(Backward, var_no_grad) {
 
 TEST(Backward, shared_var) {
   f::ProgramDescBind program;
-  f::BlockDescBind *block = program.Block(0);
+  f::BlockDescBind *block = program.MutableBlock(0);
   f::OpDescBind *op1 = block->AppendOp();
   op1->SetType("rowwise_add");
   op1->SetInput("X", {"x1"});
@@ -880,7 +880,7 @@ TEST(Backward, shared_var) {
 
 TEST(Backward, half_backward) {
   f::ProgramDescBind program;
-  f::BlockDescBind *block = program.Block(0);
+  f::BlockDescBind *block = program.MutableBlock(0);
   auto *op1 = block->AppendOp();
   op1->SetType("minus");
   op1->SetInput("X", {"a"});
diff --git a/paddle/framework/block_desc.cc b/paddle/framework/block_desc.cc
index b73a20cc89d936c2beee6a39cdf71cda3915bcdc..9e3d597f3a2c84623a1ce9e4b6f4b956cffde211 100644
--- a/paddle/framework/block_desc.cc
+++ b/paddle/framework/block_desc.cc
@@ -113,7 +113,7 @@ BlockDescBind *BlockDescBind::ParentBlock() const {
   if (this->desc_->parent_idx() == kNoneBlockIndex) {
     return nullptr;
   }
-  return prog_->Block(static_cast<size_t>(this->desc_->parent_idx()));
+  return prog_->MutableBlock(static_cast<size_t>(this->desc_->parent_idx()));
 }
 
 BlockDesc *BlockDescBind::Proto() {
diff --git a/paddle/framework/executor.cc b/paddle/framework/executor.cc
index 3e9d8b3084e8a76f3d5b8367b0ec45ed74dec42f..9bf2311dc835c701c9311880b8adba486a7d446c 100644
--- a/paddle/framework/executor.cc
+++ b/paddle/framework/executor.cc
@@ -73,33 +73,32 @@ static void CreateTensor(Variable* var, VarDesc::VarType var_type) {
   }
 }
 
-void Executor::Run(const ProgramDesc& pdesc, Scope* scope, int block_id) {
+void Executor::Run(const ProgramDescBind& pdesc, Scope* scope, int block_id) {
   // TODO(tonyyang-svail):
   //    - only runs on the first device (i.e. no interdevice communication)
   //    - will change to use multiple blocks for RNN op and Cond Op
-  PADDLE_ENFORCE_GT(pdesc.blocks_size(), block_id);
-  auto& block = pdesc.blocks(block_id);
+  PADDLE_ENFORCE_LT(block_id, pdesc.Size());
+  auto& block = pdesc.Block(block_id);
   auto& device = device_contexts_[0];
 
   Scope& local_scope = scope->NewScope();
 
-  for (auto& var : block.vars()) {
-    if (var.persistable()) {
-      auto* ptr = scope->Var(var.name());
-      CreateTensor(ptr, var.type());
-      VLOG(3) << "Create Variable " << var.name()
+  for (auto& var : block.AllVars()) {
+    if (var->Persistable()) {
+      auto* ptr = scope->Var(var->Name());
+      CreateTensor(ptr, var->GetType());
+      VLOG(3) << "Create Variable " << var->Name()
               << " global, which pointer is " << ptr;
     } else {
-      auto* ptr = local_scope.Var(var.name());
-      CreateTensor(ptr, var.type());
-      VLOG(3) << "Create Variable " << var.name()
+      auto* ptr = local_scope.Var(var->Name());
+      CreateTensor(ptr, var->GetType());
+      VLOG(3) << "Create Variable " << var->Name()
               << " locally, which pointer is " << ptr;
     }
   }
 
-  for (auto& op_desc : block.ops()) {
-    auto op = paddle::framework::OpRegistry::CreateOp(
-        op_desc, const_cast<ProgramDesc*>(&pdesc));
+  for (auto& op_desc : block.AllOps()) {
+    auto op = paddle::framework::OpRegistry::CreateOp(*op_desc);
     op->Run(local_scope, *device);
   }
 
diff --git a/paddle/framework/executor.h b/paddle/framework/executor.h
index 793ee954e25f7da6c9d04ea6acc2ad78812e8329..c78bfe8f9f07f1324515f0baaca4a94cc0fe844e 100644
--- a/paddle/framework/executor.h
+++ b/paddle/framework/executor.h
@@ -14,8 +14,8 @@ limitations under the License. */
 
 #pragma once
 
-#include "paddle/framework/framework.pb.h"
 #include "paddle/framework/op_info.h"
+#include "paddle/framework/program_desc.h"
 #include "paddle/framework/scope.h"
 #include "paddle/framework/tensor.h"
 
@@ -34,7 +34,7 @@ class Executor {
    *  ProgramDesc
    *  Scope
    */
-  void Run(const ProgramDesc&, Scope*, int);
+  void Run(const ProgramDescBind&, Scope*, int);
 
  private:
   std::vector<platform::DeviceContext*> device_contexts_;
diff --git a/paddle/framework/op_desc.cc b/paddle/framework/op_desc.cc
index c2d6f124ad292bf46b4e7e9a1dcc2984aae7fcda..0779137639e6cd9f6ecf3bbbc24d081cae3de9c0 100644
--- a/paddle/framework/op_desc.cc
+++ b/paddle/framework/op_desc.cc
@@ -52,6 +52,22 @@ class CompileTimeInferShapeContext : public InferShapeContext {
   const std::vector<std::string> &Outputs(
       const std::string &name) const override;
 
+  void ShareLoD(const std::string &in, const std::string &out, size_t i = 0,
+                size_t j = 0) const override {
+    PADDLE_ENFORCE_LT(i, Inputs(in).size());
+    PADDLE_ENFORCE_LT(j, Outputs(out).size());
+    auto *in_var = block_.FindVarRecursive(Inputs(in)[i]);
+    auto *out_var = block_.FindVarRecursive(Outputs(out)[j]);
+    if (in_var->GetType() != VarDesc::LOD_TENSOR) {
+      VLOG(3) << "input " << in << "is not LodTensor";
+      return;
+    }
+    PADDLE_ENFORCE_EQ(in_var->GetType(), VarDesc::LOD_TENSOR,
+                      "The %d-th output of Output(%s) must be LoDTensor.", j,
+                      out);
+    in_var->SetLoDLevel(out_var->GetLodLevel());
+  }
+
  private:
   DDim GetDim(const std::string &name) const override;
 
@@ -98,7 +114,12 @@ OpDescBind::OpDescBind(const OpDesc &desc, ProgramDescBind *prog)
   // restore attrs_
   for (const OpDesc::Attr &attr : desc_.attrs()) {
     std::string attr_name = attr.name();
-    attrs_[attr_name] = GetAttrValue(attr, prog->Proto());
+    if (attr.type() != AttrType::BLOCK) {
+      attrs_[attr_name] = GetAttrValue(attr);
+    } else {
+      auto bid = attr.block_idx();
+      attrs_[attr_name] = prog->MutableBlock(bid);
+    }
   }
 }
 
@@ -172,8 +193,7 @@ void OpDescBind::SetAttr(const std::string &name, const Attribute &v) {
 }
 
 void OpDescBind::SetBlockAttr(const std::string &name, BlockDescBind &block) {
-  BlockDesc *desc = block.Proto();
-  this->attrs_[name] = desc;
+  this->attrs_[name] = &block;
   need_update_ = true;
 }
 
@@ -192,7 +212,7 @@ Attribute OpDescBind::GetAttr(const std::string &name) const {
 int OpDescBind::GetBlockAttr(const std::string &name) const {
   auto it = attrs_.find(name);
   PADDLE_ENFORCE(it != attrs_.end(), "Attribute %s is not found", name);
-  return boost::get<BlockDesc *>(it->second)->idx();
+  return boost::get<BlockDescBind *>(it->second)->ID();
 }
 
 const std::unordered_map<std::string, Attribute> &OpDescBind::GetAttrMap()
diff --git a/paddle/framework/op_registry.cc b/paddle/framework/op_registry.cc
index c2f2438edf6daadf26cbc6db37f6668739ab1726..8dedd873aad648174b770b84e5232cd17b577e72 100644
--- a/paddle/framework/op_registry.cc
+++ b/paddle/framework/op_registry.cc
@@ -43,13 +43,15 @@ static VariableNameMap ConvertOpDescVarsToVarNameMap(
   return ret_val;
 }
 
-std::unique_ptr<OperatorBase> OpRegistry::CreateOp(const OpDesc& op_desc,
-                                                   ProgramDesc* program) {
+std::unique_ptr<OperatorBase> OpRegistry::CreateOp(const OpDesc& op_desc) {
+  VLOG(1) << "CreateOp directly from OpDesc is deprecated. It should only be"
+             "used in unit tests. Use CreateOp(const OpDescBind& op_desc) "
+             "instead.";
   VariableNameMap inputs = ConvertOpDescVarsToVarNameMap(op_desc.inputs());
   VariableNameMap outputs = ConvertOpDescVarsToVarNameMap(op_desc.outputs());
   AttributeMap attrs;
   for (auto& attr : op_desc.attrs()) {
-    attrs[attr.name()] = GetAttrValue(attr, program);
+    attrs[attr.name()] = GetAttrValue(attr);
   }
 
   return CreateOp(op_desc.type(), inputs, outputs, attrs);
diff --git a/paddle/framework/op_registry.h b/paddle/framework/op_registry.h
index 19a9fc3802a2f2348ad7d50a267615ed70bbc4fe..2bb5e0e8ec29fb2df81549650aa0c65bc1e51c49 100644
--- a/paddle/framework/op_registry.h
+++ b/paddle/framework/op_registry.h
@@ -77,8 +77,7 @@ class OpRegistry {
                                                 const VariableNameMap& outputs,
                                                 AttributeMap attrs);
 
-  static std::unique_ptr<OperatorBase> CreateOp(const OpDesc& op_desc,
-                                                ProgramDesc* program);
+  static std::unique_ptr<OperatorBase> CreateOp(const OpDesc& op_desc);
 
   static std::unique_ptr<OperatorBase> CreateOp(const OpDescBind& op_desc);
 };
diff --git a/paddle/framework/op_registry_test.cc b/paddle/framework/op_registry_test.cc
index 6289125d7c782e542e5c55e1d4403836351b7e05..b860fe6cac773d1e85adecc43f5dfec42b6c7661 100644
--- a/paddle/framework/op_registry_test.cc
+++ b/paddle/framework/op_registry_test.cc
@@ -74,7 +74,7 @@ TEST(OpRegistry, CreateOp) {
   attr->set_type(paddle::framework::AttrType::FLOAT);
   attr->set_f(scale);
 
-  auto op = paddle::framework::OpRegistry::CreateOp(op_desc, nullptr);
+  auto op = paddle::framework::OpRegistry::CreateOp(op_desc);
   paddle::framework::Scope scope;
   paddle::platform::CPUDeviceContext dev_ctx;
   op->Run(scope, dev_ctx);
@@ -95,7 +95,7 @@ TEST(OpRegistry, IllegalAttr) {
 
   bool caught = false;
   try {
-    paddle::framework::OpRegistry::CreateOp(op_desc, nullptr);
+    paddle::framework::OpRegistry::CreateOp(op_desc);
   } catch (paddle::platform::EnforceNotMet err) {
     caught = true;
     std::string msg = "larger_than check fail";
@@ -115,7 +115,7 @@ TEST(OpRegistry, DefaultValue) {
 
   ASSERT_TRUE(op_desc.IsInitialized());
 
-  auto op = paddle::framework::OpRegistry::CreateOp(op_desc, nullptr);
+  auto op = paddle::framework::OpRegistry::CreateOp(op_desc);
   paddle::framework::Scope scope;
   paddle::platform::CPUDeviceContext dev_ctx;
   op->Run(scope, dev_ctx);
@@ -131,7 +131,7 @@ TEST(OpRegistry, CustomChecker) {
   // attr 'test_attr' is not set
   bool caught = false;
   try {
-    paddle::framework::OpRegistry::CreateOp(op_desc, nullptr);
+    paddle::framework::OpRegistry::CreateOp(op_desc);
   } catch (paddle::platform::EnforceNotMet err) {
     caught = true;
     std::string msg = "Attribute 'test_attr' is required!";
@@ -149,7 +149,7 @@ TEST(OpRegistry, CustomChecker) {
   attr->set_i(3);
   caught = false;
   try {
-    paddle::framework::OpRegistry::CreateOp(op_desc, nullptr);
+    paddle::framework::OpRegistry::CreateOp(op_desc);
   } catch (paddle::platform::EnforceNotMet err) {
     caught = true;
     std::string msg = "'test_attr' must be even!";
@@ -166,7 +166,7 @@ TEST(OpRegistry, CustomChecker) {
   attr->set_name("test_attr");
   attr->set_type(paddle::framework::AttrType::INT);
   attr->set_i(4);
-  auto op = paddle::framework::OpRegistry::CreateOp(op_desc, nullptr);
+  auto op = paddle::framework::OpRegistry::CreateOp(op_desc);
   paddle::platform::CPUDeviceContext dev_ctx;
   paddle::framework::Scope scope;
   op->Run(scope, dev_ctx);
diff --git a/paddle/framework/operator.cc b/paddle/framework/operator.cc
index 222a252dc409bf30d5d6abea95156b41cfcd221a..aa46829fdde82b58a649108bf708901299cd8153 100644
--- a/paddle/framework/operator.cc
+++ b/paddle/framework/operator.cc
@@ -351,6 +351,20 @@ class RuntimeInferShapeContext : public InferShapeContext {
     return op_.Outputs(name);
   }
 
+  void ShareLoD(const std::string& in, const std::string& out, size_t i = 0,
+                size_t j = 0) const override {
+    PADDLE_ENFORCE_LT(i, Inputs(in).size());
+    PADDLE_ENFORCE_LT(j, Outputs(out).size());
+    Variable* in_var = scope_.FindVar(Inputs(in)[i]);
+    Variable* out_var = scope_.FindVar(Outputs(out)[j]);
+    if (!in_var->IsType<LoDTensor>()) return;
+    PADDLE_ENFORCE(out_var->IsType<LoDTensor>(),
+                   "The %d-th output of Output(%s) must be LoDTensor.", j, out);
+    auto in_tensor = in_var->Get<LoDTensor>();
+    auto* out_tensor = out_var->GetMutable<LoDTensor>();
+    out_tensor->set_lod(in_tensor.lod());
+  }
+
  private:
   DDim GetDim(const std::string& name) const override {
     Variable* var = scope_.FindVar(name);
diff --git a/paddle/framework/operator_test.cc b/paddle/framework/operator_test.cc
index 3c07621293389fc7803b0295d9d30b2c12d6e327..42e0d52eed3911d8e684e76a88bc690ca0783ce5 100644
--- a/paddle/framework/operator_test.cc
+++ b/paddle/framework/operator_test.cc
@@ -83,7 +83,7 @@ TEST(OperatorBase, all) {
   paddle::platform::CPUDeviceContext device_context;
   paddle::framework::Scope scope;
 
-  auto op = paddle::framework::OpRegistry::CreateOp(op_desc, nullptr);
+  auto op = paddle::framework::OpRegistry::CreateOp(op_desc);
   scope.Var("OUT1");
   ASSERT_EQ(paddle::framework::op_run_num, 0);
   op->Run(scope, device_context);
@@ -208,7 +208,7 @@ TEST(OpKernel, all) {
   paddle::platform::CPUDeviceContext cpu_device_context;
   paddle::framework::Scope scope;
 
-  auto op = paddle::framework::OpRegistry::CreateOp(op_desc, nullptr);
+  auto op = paddle::framework::OpRegistry::CreateOp(op_desc);
   ASSERT_EQ(paddle::framework::cpu_kernel_run_num, 0);
   op->Run(scope, cpu_device_context);
   ASSERT_EQ(paddle::framework::cpu_kernel_run_num, 1);
@@ -244,7 +244,7 @@ TEST(OpKernel, multi_inputs) {
   scope.Var("y0")->GetMutable<LoDTensor>();
   scope.Var("y1")->GetMutable<LoDTensor>();
 
-  auto op = paddle::framework::OpRegistry::CreateOp(op_desc, nullptr);
+  auto op = paddle::framework::OpRegistry::CreateOp(op_desc);
   op->Run(scope, cpu_device_context);
 }
 
diff --git a/paddle/framework/program_desc.h b/paddle/framework/program_desc.h
index ce1721472d9046f50b7fc88253fa3f2dbaaf51a8..b1cb086de4345902482d8254b8aeec041ecf81bc 100644
--- a/paddle/framework/program_desc.h
+++ b/paddle/framework/program_desc.h
@@ -37,7 +37,9 @@ class ProgramDescBind {
 
   BlockDescBind *AppendBlock(const BlockDescBind &parent);
 
-  BlockDescBind *Block(size_t idx) { return blocks_[idx].get(); }
+  BlockDescBind *MutableBlock(size_t idx) { return blocks_[idx].get(); }
+
+  const BlockDescBind &Block(size_t idx) const { return *blocks_[idx]; }
 
   size_t Size() const { return blocks_.size(); }
 
diff --git a/paddle/framework/program_desc_test.cc b/paddle/framework/program_desc_test.cc
index d28c2a0bff932f5aa37c69231495895dacb07bb3..83e7286e0ec3639fa589b0958922543a3ba16a00 100644
--- a/paddle/framework/program_desc_test.cc
+++ b/paddle/framework/program_desc_test.cc
@@ -20,7 +20,7 @@ namespace paddle {
 namespace framework {
 TEST(ProgramDesc, copy_ctor) {
   ProgramDescBind program;
-  auto* global_block = program.Block(0);
+  auto* global_block = program.MutableBlock(0);
   auto* x = global_block->Var("X");
   x->SetType(VarDesc_VarType_LOD_TENSOR);
   x->SetLoDLevel(0);
@@ -44,7 +44,7 @@ TEST(ProgramDesc, copy_ctor) {
 
   ProgramDescBind program_copy(program);
 
-  auto* global_block_copy = program_copy.Block(0);
+  auto* global_block_copy = program_copy.MutableBlock(0);
   ASSERT_NE(global_block, global_block_copy);
 
   auto assert_same_var = [&](const std::string& name, VarDescBind* var_before) {
@@ -82,7 +82,7 @@ TEST(ProgramDesc, copy_ctor) {
 
 TEST(ProgramDescBind, serialize_and_deserialize) {
   ProgramDescBind program_origin;
-  auto* global_block = program_origin.Block(0);
+  auto* global_block = program_origin.MutableBlock(0);
   auto* x = global_block->Var("X");
   x->SetType(VarDesc_VarType_LOD_TENSOR);
   x->SetLoDLevel(0);
@@ -108,7 +108,7 @@ TEST(ProgramDescBind, serialize_and_deserialize) {
   program_origin.Proto()->SerializeToString(&binary_str);
 
   ProgramDescBind program_restored(binary_str);
-  auto* global_block_restored = program_restored.Block(0);
+  auto* global_block_restored = program_restored.MutableBlock(0);
   ASSERT_NE(global_block, global_block_restored);
 
   auto assert_same_var = [&](const std::string& name, VarDescBind* var_before) {
diff --git a/paddle/framework/prune_test.cc b/paddle/framework/prune_test.cc
index cadd114fbc3de897a13504e665ce464e83d312ff..5988874809f51c09b3d3d279be6c1e8d43d7a782 100644
--- a/paddle/framework/prune_test.cc
+++ b/paddle/framework/prune_test.cc
@@ -52,7 +52,7 @@ void AddOp(const std::string &type, const f::VariableNameMap &inputs,
 
 TEST(Prune, one_operator) {
   f::ProgramDescBind program;
-  f::BlockDescBind *block = program.Block(0);
+  f::BlockDescBind *block = program.MutableBlock(0);
 
   AddOp("one_one", {{"input", {"a"}}}, {{"output", {"b"}}}, {}, block);
 
@@ -69,7 +69,7 @@ TEST(Prune, one_operator) {
 
 TEST(Prune, forward) {
   f::ProgramDescBind program;
-  f::BlockDescBind *block = program.Block(0);
+  f::BlockDescBind *block = program.MutableBlock(0);
 
   AddOp("one_one", {{"input", {"a"}}}, {{"output", {"b"}}}, {}, block);
   AddOp("one_one", {{"input", {"b"}}}, {{"output", {"c"}}}, {}, block);
@@ -88,7 +88,7 @@ TEST(Prune, forward) {
 
 TEST(Prune, multi_input_op) {
   f::ProgramDescBind program;
-  f::BlockDescBind *block = program.Block(0);
+  f::BlockDescBind *block = program.MutableBlock(0);
 
   AddOp("one_one", {{"input", {"a0"}}}, {{"output", {"b0"}}}, {}, block);
   AddOp("one_one", {{"input", {"a1"}}}, {{"output", {"b1"}}}, {}, block);
@@ -106,7 +106,7 @@ TEST(Prune, multi_input_op) {
 
 TEST(Prune, multi_output_op) {
   f::ProgramDescBind program;
-  f::BlockDescBind *block = program.Block(0);
+  f::BlockDescBind *block = program.MutableBlock(0);
 
   AddOp("one_two", {{"input", {"a"}}}, {{"output", {"b", "c"}}}, {}, block);
   AddOp("one_one", {{"input", {"b"}}}, {{"output", {"b1"}}}, {}, block);
@@ -122,7 +122,7 @@ TEST(Prune, multi_output_op) {
 
 TEST(Prune, multi_target) {
   f::ProgramDescBind program;
-  f::BlockDescBind *block = program.Block(0);
+  f::BlockDescBind *block = program.MutableBlock(0);
 
   AddOp("one_two", {{"input", {"a"}}}, {{"output", {"b", "c"}}}, {}, block);
   AddOp("one_one", {{"input", {"b"}}}, {{"output", {"b1"}}}, {}, block);
diff --git a/paddle/framework/shape_inference.cc b/paddle/framework/shape_inference.cc
index 33a1d0b9b217c5d2a4b0fb63f427529e7988b24e..8169df8e4629e2d02d3dabcd6a8a102ad0077a81 100644
--- a/paddle/framework/shape_inference.cc
+++ b/paddle/framework/shape_inference.cc
@@ -28,9 +28,6 @@ void InferShapeContext::SetOutputsDim(
   SetDims(names, dims);
 }
 
-void InferShapeContext::ShareLoD(const std::string &in, const std::string &out,
-                                 size_t i, size_t j) const {}
-
 std::vector<framework::DDim> InferShapeContext::GetDims(
     const std::vector<std::string> &names) const {
   std::vector<framework::DDim> ret;
diff --git a/paddle/framework/shape_inference.h b/paddle/framework/shape_inference.h
index f1f1e44bccd771be81cad7c28efe9b1b885eef6b..6f19900ef1a3e88fe78d457a03c344ea586ab551 100644
--- a/paddle/framework/shape_inference.h
+++ b/paddle/framework/shape_inference.h
@@ -43,9 +43,8 @@ class InferShapeContext {
   virtual const std::vector<std::string> &Outputs(
       const std::string &name) const = 0;
 
-  // TODO(qiao) implement this function
-  void ShareLoD(const std::string &in, const std::string &out, size_t i = 0,
-                size_t j = 0) const;
+  virtual void ShareLoD(const std::string &in, const std::string &out,
+                        size_t i = 0, size_t j = 0) const = 0;
 
  protected:
   virtual framework::DDim GetDim(const std::string &name) const = 0;
diff --git a/paddle/framework/type_defs.h b/paddle/framework/type_defs.h
index c38c4a8ae9a46c8bda913e7643e812592de68e6e..afeeb1914ac30188b93c3b9da30bb5ceaf74416e 100644
--- a/paddle/framework/type_defs.h
+++ b/paddle/framework/type_defs.h
@@ -36,7 +36,7 @@ using VariableNameMap = std::map<std::string, std::vector<std::string>>;
 using Attribute =
     boost::variant<boost::blank, int, float, std::string, std::vector<int>,
                    std::vector<float>, std::vector<std::string>, bool,
-                   std::vector<bool>, BlockDesc*>;
+                   std::vector<bool>, BlockDescBind*>;
 
 using AttributeMap = std::unordered_map<std::string, Attribute>;
 
diff --git a/paddle/framework/var_type_inference_test.cc b/paddle/framework/var_type_inference_test.cc
index 918de1fd055e32888f71ffea1f33993ba1210e86..9035e63fa48ffdf7c72061b0a4248538d7a357e4 100644
--- a/paddle/framework/var_type_inference_test.cc
+++ b/paddle/framework/var_type_inference_test.cc
@@ -63,41 +63,43 @@ namespace framework {
 
 TEST(InferVarType, sum_op) {
   ProgramDescBind prog;
-  auto *op = prog.Block(0)->AppendOp();
+  auto *op = prog.MutableBlock(0)->AppendOp();
   op->SetType("sum");
   op->SetInput("X", {"test_a", "test_b", "test_c"});
   op->SetOutput("Out", {"test_out"});
 
-  prog.Block(0)->Var("test_a")->SetType(VarDesc::SELECTED_ROWS);
-  prog.Block(0)->Var("test_b")->SetType(VarDesc::SELECTED_ROWS);
-  prog.Block(0)->Var("test_c")->SetType(VarDesc::SELECTED_ROWS);
-  prog.Block(0)->Var("test_out");
+  prog.MutableBlock(0)->Var("test_a")->SetType(VarDesc::SELECTED_ROWS);
+  prog.MutableBlock(0)->Var("test_b")->SetType(VarDesc::SELECTED_ROWS);
+  prog.MutableBlock(0)->Var("test_c")->SetType(VarDesc::SELECTED_ROWS);
+  prog.MutableBlock(0)->Var("test_out");
 
-  op->InferVarType(prog.Block(0));
+  op->InferVarType(prog.MutableBlock(0));
 
-  ASSERT_EQ(VarDesc::SELECTED_ROWS, prog.Block(0)->Var("test_out")->GetType());
+  ASSERT_EQ(VarDesc::SELECTED_ROWS,
+            prog.MutableBlock(0)->Var("test_out")->GetType());
 
-  prog.Block(0)->Var("test_b")->SetType(VarDesc::LOD_TENSOR);
-  op->InferVarType(prog.Block(0));
-  ASSERT_EQ(VarDesc::LOD_TENSOR, prog.Block(0)->Var("test_out")->GetType());
+  prog.MutableBlock(0)->Var("test_b")->SetType(VarDesc::LOD_TENSOR);
+  op->InferVarType(prog.MutableBlock(0));
+  ASSERT_EQ(VarDesc::LOD_TENSOR,
+            prog.MutableBlock(0)->Var("test_out")->GetType());
 }
 
 TEST(InferVarType, sum_op_without_infer_var_type) {
   ProgramDescBind prog;
-  auto *op = prog.Block(0)->AppendOp();
+  auto *op = prog.MutableBlock(0)->AppendOp();
   op->SetType("sum_without_infer_var_type");
   op->SetInput("X", {"test2_a", "test2_b", "test2_c"});
   op->SetOutput("Out", {"test2_out"});
 
-  prog.Block(0)->Var("test2_a")->SetType(VarDesc::SELECTED_ROWS);
-  prog.Block(0)->Var("test2_b")->SetType(VarDesc::SELECTED_ROWS);
-  prog.Block(0)->Var("test2_c")->SetType(VarDesc::SELECTED_ROWS);
-  prog.Block(0)->Var("test2_out");
+  prog.MutableBlock(0)->Var("test2_a")->SetType(VarDesc::SELECTED_ROWS);
+  prog.MutableBlock(0)->Var("test2_b")->SetType(VarDesc::SELECTED_ROWS);
+  prog.MutableBlock(0)->Var("test2_c")->SetType(VarDesc::SELECTED_ROWS);
+  prog.MutableBlock(0)->Var("test2_out");
 
-  op->InferVarType(prog.Block(0));
+  op->InferVarType(prog.MutableBlock(0));
 
   ASSERT_EQ(VarDesc_VarType_LOD_TENSOR,
-            prog.Block(0)->Var("test2_out")->GetType());
+            prog.MutableBlock(0)->Var("test2_out")->GetType());
 }
 
 }  // namespace framework
diff --git a/paddle/operators/dynamic_recurrent_op_test.cc b/paddle/operators/dynamic_recurrent_op_test.cc
index fff63efb24c70b7e864e2d5b011a22883c13dede..8d840e259b190ead86a66df8ab31c5170db4d824 100644
--- a/paddle/operators/dynamic_recurrent_op_test.cc
+++ b/paddle/operators/dynamic_recurrent_op_test.cc
@@ -51,7 +51,7 @@ class RNNAlgorithmTestHelper : public ::testing::Test {
     CreateGlobalVariables();
 
     auto op_desc = CreateOpDesc();
-    op = paddle::framework::OpRegistry::CreateOp(op_desc, nullptr);
+    op = paddle::framework::OpRegistry::CreateOp(op_desc);
     dop = &(dynamic_cast<DynamicRecurrentOp*>(op.get())->rnn);
     InitCacheManually();
     InitStepNet();
diff --git a/paddle/operators/gaussian_random_op.cc b/paddle/operators/gaussian_random_op.cc
index 04dfdf7c48381240108cf924979764966599151f..be7f542a7a274d88d2dac953995d6a83a6ce022d 100644
--- a/paddle/operators/gaussian_random_op.cc
+++ b/paddle/operators/gaussian_random_op.cc
@@ -45,14 +45,14 @@ class GaussianRandomOp : public framework::OperatorWithKernel {
   void InferShape(framework::InferShapeContext* ctx) const override {
     PADDLE_ENFORCE(ctx->HasOutput("Out"),
                    "Output(Out) of GaussianRandomOp should not be null.");
-    auto dims = ctx->Attrs().Get<std::vector<int>>("dims");
+    auto shape = ctx->Attrs().Get<std::vector<int>>("shape");
     std::vector<int64_t> temp;
-    temp.reserve(dims.size());
-    for (auto dim : dims) {
+    temp.reserve(shape.size());
+    for (auto dim : shape) {
       temp.push_back(static_cast<int64_t>(dim));
     }
-    PADDLE_ENFORCE(dims.size() > 0UL,
-                   "dims can be one int or array. dims must be set.");
+    PADDLE_ENFORCE(shape.size() > 0UL,
+                   "shape can be one int or array. shape must be set.");
     ctx->SetOutputDim("Out", framework::make_ddim(temp));
   }
 
@@ -74,7 +74,7 @@ GaussianRandom operator.
 Use to initialize tensor with gaussian random generator.
 )DOC");
 
-    AddAttr<std::vector<int>>("dims", "The dimension of random tensor.");
+    AddAttr<std::vector<int>>("shape", "The dimension of random tensor.");
     AddAttr<float>("mean", "mean of random tensor.").SetDefault(.0f);
     AddAttr<float>("std", "std of random tensor.").SetDefault(1.0f);
     AddAttr<int>("seed",
diff --git a/paddle/operators/lookup_table_op.cc b/paddle/operators/lookup_table_op.cc
index 8fdd42352e5e6857e4bf0e4645f82c8e2fcdc6fd..0b361e20f2037b9b75bc8670488dff1c50fb689c 100644
--- a/paddle/operators/lookup_table_op.cc
+++ b/paddle/operators/lookup_table_op.cc
@@ -43,7 +43,7 @@ class LookupTableOp : public framework::OperatorWithKernel {
  protected:
   framework::DataType IndicateDataType(
       const framework::ExecutionContext& ctx) const override {
-    return framework::ToDataType(ctx.Input<Tensor>("W")->type());
+    return framework::ToDataType(ctx.Input<LoDTensor>("W")->type());
   }
 };
 
@@ -93,7 +93,7 @@ class LookupTableOpGrad : public framework::OperatorWithKernel {
  protected:
   framework::DataType IndicateDataType(
       const framework::ExecutionContext& ctx) const override {
-    return framework::ToDataType(ctx.Input<Tensor>("W")->type());
+    return framework::ToDataType(ctx.Input<LoDTensor>("W")->type());
   }
 };
 
diff --git a/paddle/operators/lookup_table_op.cu b/paddle/operators/lookup_table_op.cu
index 837b2a1f4c94f201c0ab498671f936aab6c7a811..c7ba1720662fe80c945f2b4aa19745e408d40948 100644
--- a/paddle/operators/lookup_table_op.cu
+++ b/paddle/operators/lookup_table_op.cu
@@ -61,16 +61,16 @@ template <typename T>
 class LookupTableCUDAKernel : public framework::OpKernel<T> {
  public:
   void Compute(const framework::ExecutionContext& context) const override {
-    auto table_t = context.Input<Tensor>("W");
-    auto ids_t = context.Input<Tensor>("Ids");
-    auto output_t = context.Output<Tensor>("Out");
+    auto* table_t = context.Input<LoDTensor>("W");
+    auto* ids_t = context.Input<LoDTensor>("Ids");
+    auto* output_t = context.Output<LoDTensor>("Out");
 
     size_t N = table_t->dims()[0];
     size_t D = table_t->dims()[1];
     size_t K = ids_t->numel();
-    auto ids = ids_t->data<int64_t>();
-    auto table = table_t->data<T>();
-    auto output = output_t->mutable_data<T>(context.GetPlace());
+    auto* ids = ids_t->data<int64_t>();
+    auto* table = table_t->data<T>();
+    auto* output = output_t->mutable_data<T>(context.GetPlace());
 
     dim3 threads(128, 8);
     dim3 grids(8, 1);
@@ -87,9 +87,9 @@ class LookupTableGradCUDAKernel : public framework::OpKernel<T> {
   void Compute(const framework::ExecutionContext& context) const override {
     bool is_sparse = context.Attr<bool>("is_sparse");
     if (is_sparse) {
-      auto* ids = context.Input<Tensor>("Ids");
-      auto* table = context.Input<Tensor>("W");
-      auto* d_output = context.Input<Tensor>(framework::GradVarName("Out"));
+      auto* ids = context.Input<LoDTensor>("Ids");
+      auto* table = context.Input<LoDTensor>("W");
+      auto* d_output = context.Input<LoDTensor>(framework::GradVarName("Out"));
       auto* d_table = context.Output<SelectedRows>(framework::GradVarName("W"));
 
       auto* ids_data = ids->data<int64_t>();
@@ -116,12 +116,12 @@ class LookupTableGradCUDAKernel : public framework::OpKernel<T> {
       auto* d_output_data = d_output->data<T>();
       PADDLE_ENFORCE_EQ(d_table_value->dims(), d_output->dims());
       memory::Copy(gpu_place, d_table_data, gpu_place, d_output_data,
-                   d_output->numel(), stream);
+                   d_output->numel() * sizeof(T), stream);
 
     } else {
-      auto ids_t = context.Input<Tensor>("Ids");
-      auto d_output_t = context.Input<Tensor>(framework::GradVarName("Out"));
-      auto d_table_t = context.Output<Tensor>(framework::GradVarName("W"));
+      auto ids_t = context.Input<LoDTensor>("Ids");
+      auto d_output_t = context.Input<LoDTensor>(framework::GradVarName("Out"));
+      auto d_table_t = context.Output<LoDTensor>(framework::GradVarName("W"));
 
       int N = d_table_t->dims()[0];
       int D = d_table_t->dims()[1];
diff --git a/paddle/operators/lookup_table_op.h b/paddle/operators/lookup_table_op.h
index 54067cd01d3ef35a050a3c2565ea19cb6520bcec..ea3289d2731a4b2098c3a199464559b0a0ce7202 100644
--- a/paddle/operators/lookup_table_op.h
+++ b/paddle/operators/lookup_table_op.h
@@ -19,22 +19,22 @@
 namespace paddle {
 namespace operators {
 
-using Tensor = framework::Tensor;
+using LoDTensor = framework::LoDTensor;
 using SelectedRows = framework::SelectedRows;
 
 template <typename T>
 class LookupTableKernel : public framework::OpKernel<T> {
  public:
   void Compute(const framework::ExecutionContext& context) const override {
-    auto table_t = context.Input<Tensor>("W");      // float tensor
-    auto ids_t = context.Input<Tensor>("Ids");      // int tensor
-    auto output_t = context.Output<Tensor>("Out");  // float tensor
+    auto* table_t = context.Input<LoDTensor>("W");      // float tensor
+    auto* ids_t = context.Input<LoDTensor>("Ids");      // int tensor
+    auto* output_t = context.Output<LoDTensor>("Out");  // float tensor
 
     int N = table_t->dims()[0];
     int D = table_t->dims()[1];
-    auto ids = ids_t->data<int64_t>();
-    auto table = table_t->data<T>();
-    auto output = output_t->mutable_data<T>(context.GetPlace());
+    auto* ids = ids_t->data<int64_t>();
+    auto* table = table_t->data<T>();
+    auto* output = output_t->mutable_data<T>(context.GetPlace());
     for (int64_t i = 0; i < ids_t->numel(); ++i) {
       PADDLE_ENFORCE_LT(ids[i], N);
       PADDLE_ENFORCE_GE(ids[i], 0);
@@ -49,9 +49,9 @@ class LookupTableGradKernel : public framework::OpKernel<T> {
   void Compute(const framework::ExecutionContext& context) const override {
     bool is_sparse = context.Attr<bool>("is_sparse");
     if (is_sparse) {
-      auto* ids = context.Input<Tensor>("Ids");
-      auto* table = context.Input<Tensor>("W");
-      auto* d_output = context.Input<Tensor>(framework::GradVarName("Out"));
+      auto* ids = context.Input<LoDTensor>("Ids");
+      auto* table = context.Input<LoDTensor>("W");
+      auto* d_output = context.Input<LoDTensor>(framework::GradVarName("Out"));
       auto* d_table = context.Output<SelectedRows>(framework::GradVarName("W"));
 
       auto* ids_data = ids->data<int64_t>();
@@ -76,10 +76,10 @@ class LookupTableGradKernel : public framework::OpKernel<T> {
       PADDLE_ENFORCE_EQ(d_table_value->dims(), d_output->dims());
       memcpy(d_table_data, d_output_data, sizeof(T) * d_output->numel());
     } else {
-      auto* ids = context.Input<Tensor>("Ids");
-      auto* d_output = context.Input<Tensor>(framework::GradVarName("Out"));
-      auto* d_table = context.Output<Tensor>(framework::GradVarName("W"));
-      auto* table = context.Input<Tensor>("W");
+      auto* ids = context.Input<LoDTensor>("Ids");
+      auto* d_output = context.Input<LoDTensor>(framework::GradVarName("Out"));
+      auto* d_table = context.Output<LoDTensor>(framework::GradVarName("W"));
+      auto* table = context.Input<LoDTensor>("W");
 
       auto* ids_data = ids->data<int64_t>();
       auto ids_dim = ids->dims();
diff --git a/paddle/operators/sequence_conv_op.cc b/paddle/operators/sequence_conv_op.cc
index bdb52265a529f560b4622ee037dcb3160ac90dec..a3f2ed14439572e9723c3057d212bb773b2a4e44 100644
--- a/paddle/operators/sequence_conv_op.cc
+++ b/paddle/operators/sequence_conv_op.cc
@@ -89,7 +89,7 @@ class SequenceConvGradOp : public framework::OperatorWithKernel {
     }
     if (ctx->HasOutput(framework::GradVarName("X"))) {
       ctx->SetOutputDim(framework::GradVarName("X"), ctx->GetInputDim("X"));
-      ctx->ShareLoD(framework::GradVarName("X"), "X");
+      ctx->ShareLoD("X", framework::GradVarName("X"));
     }
     if (ctx->HasOutput(framework::GradVarName("Filter"))) {
       ctx->SetOutputDim(framework::GradVarName("Filter"),
diff --git a/paddle/pybind/protobuf.cc b/paddle/pybind/protobuf.cc
index 14adfa1f35225ca5bf0c093dcf75d1c21af69676..dcae426c7e231757d796c5a84cc5a1c2b0d6763b 100644
--- a/paddle/pybind/protobuf.cc
+++ b/paddle/pybind/protobuf.cc
@@ -129,7 +129,8 @@ void BindProgramDesc(py::module &m) {
              }
              return retv;
            })
-      .def("block", &ProgramDescBind::Block, py::return_value_policy::reference)
+      .def("block", &ProgramDescBind::MutableBlock,
+           py::return_value_policy::reference)
       .def("num_blocks", &ProgramDescBind::Size)
       .def("serialize_to_string",
            [](ProgramDescBind &program_desc) -> py::bytes {
diff --git a/paddle/pybind/pybind.cc b/paddle/pybind/pybind.cc
index 2a0075356ed1e0f0b3501ac681c5e3a1bf37e2ca..881df6ad3244e597f1c0f0121ccec08d50dd851e 100644
--- a/paddle/pybind/pybind.cc
+++ b/paddle/pybind/pybind.cc
@@ -275,7 +275,7 @@ All parameter, weight, gradient are variables in Paddle.
                     const std::vector<std::array<size_t, 2>> &targets) {
     ProgramDescBind prog_with_targets(origin);
     for (const auto &t : targets) {
-      prog_with_targets.Block(t[0])->Op(t[1])->MarkAsTarget();
+      prog_with_targets.MutableBlock(t[0])->Op(t[1])->MarkAsTarget();
     }
     ProgramDesc pruned_desc;
     Prune(*prog_with_targets.Proto(), &pruned_desc);
@@ -335,7 +335,7 @@ All parameter, weight, gradient are variables in Paddle.
                     PADDLE_ENFORCE(desc.IsInitialized(),
                                    "User OpDesc is not initialized, reason %s",
                                    desc.InitializationErrorString());
-                    return OpRegistry::CreateOp(desc, nullptr);
+                    return OpRegistry::CreateOp(desc);
                   })
       .def("backward",
            [](const OperatorBase &forwardOp,
@@ -439,7 +439,7 @@ All parameter, weight, gradient are variables in Paddle.
             PADDLE_ENFORCE(desc.IsInitialized(),
                            "User OpDesc is not initialized, reason %s",
                            desc.InitializationErrorString());
-            auto rnn_op = OpRegistry::CreateOp(desc, nullptr);
+            auto rnn_op = OpRegistry::CreateOp(desc);
             return static_cast<operators::RecurrentOp *>(rnn_op.release());
           })
       .def("set_stepnet", [](operators::RecurrentOp &self,
@@ -457,7 +457,7 @@ All parameter, weight, gradient are variables in Paddle.
                     PADDLE_ENFORCE(desc.IsInitialized(),
                                    "User OpDesc is not initialized, reason %s",
                                    desc.InitializationErrorString());
-                    auto rnn_op = OpRegistry::CreateOp(desc, nullptr);
+                    auto rnn_op = OpRegistry::CreateOp(desc);
                     return static_cast<operators::DynamicRecurrentOp *>(
                         rnn_op.release());
                   })
@@ -484,7 +484,7 @@ All parameter, weight, gradient are variables in Paddle.
                     PADDLE_ENFORCE(desc.IsInitialized(),
                                    "User OpDesc is not initialized, reason %s",
                                    desc.InitializationErrorString());
-                    auto cond_op = OpRegistry::CreateOp(desc, nullptr);
+                    auto cond_op = OpRegistry::CreateOp(desc);
                     return static_cast<operators::CondOp *>(cond_op.release());
                   })
       .def("set_truenet",
@@ -498,10 +498,7 @@ All parameter, weight, gradient are variables in Paddle.
 
   py::class_<framework::Executor>(m, "Executor")
       .def(py::init<std::vector<platform::Place> &>())
-      .def("run", [](Executor &self, ProgramDescBind *program_bind,
-                     Scope *scope, int block_id) {
-        self.Run(*program_bind->Proto(), scope, block_id);
-      });
+      .def("run", &Executor::Run);
 
   m.def("unique_integer", UniqueIntegerGenerator);
   m.def("init_gflags", InitGflags);
diff --git a/python/paddle/v2/framework/initializer.py b/python/paddle/v2/framework/initializer.py
index 377d33271355651e6dbda0d31da0692f1a4c883d..507fd16062af1e2458eb9b45407e91a8d29ea9ce 100644
--- a/python/paddle/v2/framework/initializer.py
+++ b/python/paddle/v2/framework/initializer.py
@@ -62,7 +62,7 @@ class ConstantInitializer(Initializer):
 
 
 class UniformInitializer(Initializer):
-    """Implements for random uniform distribution initializer
+    """Implements the random uniform distribution initializer
     """
 
     def __init__(self, low=-1.0, high=1.0, seed=0):
@@ -75,6 +75,7 @@ class UniformInitializer(Initializer):
         """
         assert low is not None
         assert high is not None
+        assert high >= low
         assert seed is not None
         super(UniformInitializer, self).__init__()
         self._low = low
@@ -107,3 +108,51 @@ class UniformInitializer(Initializer):
             })
         var.op = op
         return op
+
+
+class NormalInitializer(Initializer):
+    """Implements the  random Normal(Gaussian) distribution initializer
+    """
+
+    def __init__(self, loc=0.0, scale=1.0, seed=0):
+        """Constructor for NormalInitializer
+
+        Args:
+            loc: mean of the normal distribution
+            scale: standard deviation of the normal distribution
+            seed: random seed
+        """
+        assert loc is not None
+        assert scale is not None
+        assert seed is not None
+        super(NormalInitializer, self).__init__()
+        self._mean = loc
+        self._std_dev = scale
+        self._seed = seed
+
+    def __call__(self, var, block):
+        """Add normal distribution initialization ops for a variable
+
+        Args:
+            var: Variable that needs to be initialized
+            block: The block in which initialization ops
+                   should be added
+
+        Returns:
+            the initialization op
+        """
+        assert isinstance(var, framework.Variable)
+        assert isinstance(block, framework.Block)
+        # Initialization Ops should be prepended and not appended
+        op = block.prepend_op(
+            type="gaussian_random",
+            outputs={"Out": var},
+            attrs={
+                "shape": var.shape,
+                "data_type": int(var.data_type),
+                "mean": self._mean,
+                "std": self._std_dev,
+                "seed": self._seed
+            })
+        var.op = op
+        return op
diff --git a/python/paddle/v2/framework/tests/test_gaussian_random_op.py b/python/paddle/v2/framework/tests/test_gaussian_random_op.py
index 8b7779667d5e806c06b333527f774c7987ce7e73..0dc7e091a5c8dd046f36cab7f79a15b2281cdd90 100644
--- a/python/paddle/v2/framework/tests/test_gaussian_random_op.py
+++ b/python/paddle/v2/framework/tests/test_gaussian_random_op.py
@@ -19,7 +19,7 @@ class TestGaussianRandomOp(unittest.TestCase):
         op = Operator(
             "gaussian_random",
             Out='Out',
-            dims=[1000, 784],
+            shape=[1000, 784],
             mean=.0,
             std=1.,
             seed=10)
diff --git a/python/paddle/v2/framework/tests/test_initializer.py b/python/paddle/v2/framework/tests/test_initializer.py
new file mode 100644
index 0000000000000000000000000000000000000000..f28fc8a86c7c8e683e00249a2f73dbbe6d7be27c
--- /dev/null
+++ b/python/paddle/v2/framework/tests/test_initializer.py
@@ -0,0 +1,120 @@
+import unittest
+
+import paddle.v2.framework.framework as framework
+import paddle.v2.framework.initializer as initializer
+
+DELTA = 0.00001
+
+
+class TestConstantInitializer(unittest.TestCase):
+    def test_constant_initializer_default_value(self):
+        """Test the constant initializer with default value
+        """
+        program = framework.Program()
+        block = program.global_block()
+        block.create_parameter(
+            dtype="float32",
+            shape=[5, 10],
+            lod_level=0,
+            name="param",
+            initializer=initializer.ConstantInitializer())
+        self.assertEqual(len(block.ops), 1)
+        init_op = block.ops[0]
+        self.assertEqual(init_op.type, 'fill_constant')
+        self.assertAlmostEqual(init_op.attr('value'), 0.0, delta=DELTA)
+
+    def test_constant_initializer(self):
+        """Test constant initializer with supplied value
+        """
+        program = framework.Program()
+        block = program.global_block()
+        block.create_parameter(
+            dtype="float32",
+            shape=[5, 10],
+            lod_level=0,
+            name="param",
+            initializer=initializer.ConstantInitializer(2.3))
+        self.assertEqual(len(block.ops), 1)
+        init_op = block.ops[0]
+        self.assertEqual(init_op.type, 'fill_constant')
+        self.assertAlmostEqual(init_op.attr('value'), 2.3, delta=DELTA)
+
+
+class TestUniformInitializer(unittest.TestCase):
+    def test_uniform_initializer_default_value(self):
+        """Test the uniform initializer with default value
+        """
+        program = framework.Program()
+        block = program.global_block()
+        block.create_parameter(
+            dtype="float32",
+            shape=[5, 10],
+            lod_level=0,
+            name="param",
+            initializer=initializer.UniformInitializer())
+        self.assertEqual(len(block.ops), 1)
+        init_op = block.ops[0]
+        self.assertEqual(init_op.type, 'uniform_random')
+        self.assertAlmostEqual(init_op.attr('min'), -1.0, delta=DELTA)
+        self.assertAlmostEqual(init_op.attr('max'), 1.0, delta=DELTA)
+        self.assertEqual(init_op.attr('seed'), 0)
+
+    def test_uniform_initializer(self):
+        """Test uniform initializer with supplied attributes
+        """
+        program = framework.Program()
+        block = program.global_block()
+        block.create_parameter(
+            dtype="float32",
+            shape=[5, 10],
+            lod_level=0,
+            name="param",
+            initializer=initializer.UniformInitializer(-4.2, 3.1, 123))
+        self.assertEqual(len(block.ops), 1)
+        init_op = block.ops[0]
+        self.assertEqual(init_op.type, 'uniform_random')
+        self.assertAlmostEqual(init_op.attr('min'), -4.2, delta=DELTA)
+        self.assertAlmostEqual(init_op.attr('max'), 3.1, delta=DELTA)
+        self.assertEqual(init_op.attr('seed'), 123)
+
+
+class TestNormalInitializer(unittest.TestCase):
+    def test_normal_initializer_default_value(self):
+        """Test the normal initializer with default value
+        """
+        program = framework.Program()
+        block = program.global_block()
+        block.create_parameter(
+            dtype="float32",
+            shape=[5, 10],
+            lod_level=0,
+            name="param",
+            initializer=initializer.NormalInitializer())
+        self.assertEqual(len(block.ops), 1)
+        init_op = block.ops[0]
+        self.assertEqual(init_op.type, 'gaussian_random')
+        self.assertAlmostEqual(init_op.attr('mean'), 0.0, delta=DELTA)
+        self.assertAlmostEqual(init_op.attr('std'), 1.0, delta=DELTA)
+        self.assertEqual(init_op.attr('seed'), 0)
+
+    def test_normal_initializer(self):
+        """Test normal initializer with supplied attributes
+        """
+        program = framework.Program()
+        block = program.global_block()
+        block.create_parameter(
+            dtype="float32",
+            shape=[5, 10],
+            lod_level=0,
+            name="param",
+            initializer=initializer.NormalInitializer(2.3, 1.9, 123))
+        self.assertEqual(len(block.ops), 1)
+        init_op = block.ops[0]
+        self.assertEqual(init_op.type, 'gaussian_random')
+        self.assertAlmostEqual(init_op.attr('mean'), 2.3, delta=DELTA)
+        self.assertAlmostEqual(init_op.attr('std'), 1.9, delta=DELTA)
+        self.assertEqual(init_op.attr('seed'), 123)
+
+
+if __name__ == '__main__':
+    unittest.main()