diff --git a/paddle/optimizer/CMakeLists.txt b/paddle/optimizer/CMakeLists.txt
index 134ca9e9d644d8cd6c2eef48a1a9f3921c7684c3..06f6d83efe1155c8cbe76644d6b9efc91349b006 100644
--- a/paddle/optimizer/CMakeLists.txt
+++ b/paddle/optimizer/CMakeLists.txt
@@ -1,9 +1,9 @@
 include_directories(${CMAKE_CURRENT_BINARY_DIR})
 
 set(OPITMIZER_SRCS
-    adadelta_optimizer.cc
-    adagrad_optimizer.cc
-    adam_optimizer.cc
+    # adadelta_optimizer.cc
+    # adagrad_optimizer.cc
+    # adam_optimizer.cc
     optimizer.cc
     parameter_optimizer.cc
     sgd_optmizer.cc
@@ -11,9 +11,9 @@ set(OPITMIZER_SRCS
   )
 
 set(OPITMIZER_Headers
-    adadelta_optimizer.h
-    adagrad_optimizer.h
-    adam_optimizer.h
+    # adadelta_optimizer.h
+    # adagrad_optimizer.h
+    # adam_optimizer.h
     lr_policy.h
     optimizer.h
     parameter_optimizer.h
diff --git a/paddle/optimizer/Tensor.h b/paddle/optimizer/Tensor.h
index a8387c4df41ec76cce69b03d58abfb2c7863c655..d5ba4b3159f7d8dcdbb8ea9b32d70288caef3982 100644
--- a/paddle/optimizer/Tensor.h
+++ b/paddle/optimizer/Tensor.h
@@ -5,6 +5,7 @@
  */
 
 #include <string.h>
+#include "optimizer.h"
 #include "paddle/math/BaseMatrix.h"
 
 namespace paddle {
@@ -16,10 +17,14 @@ using TensorBase = BaseMatrixT<T>;
 template <class T>
 class Tensor : public TensorBase<T> {
 public:
-  Tensor(T* data, int size) : TensorBase<T>(size, 1, 0, data, false, false) {}
+  Tensor(T* data, int size) : TensorBase<T>(1, size, 0, data, false, false) {}
   T* get_buffer() { return this->data_; }
+  T& operator[](const int idx) {
+    CHECK(idx >= 0 && idx < this->width_) << " out of index range";
+    return this->data_[idx];
+  }
   // TODO: replace with tensorshape
-  size_t width() { return this->width_; }
+  size_t size() const { return this->width_; }
 };
 
 }  // namespace optimizer
diff --git a/paddle/optimizer/adadelta_optimizer.cc b/paddle/optimizer/adadelta_optimizer.cc
index 39d465cebe6826eeaf41d506d707ece237cfcfeb..b76c123ec8038c2f5e6131b5a54d501ede92819c 100644
--- a/paddle/optimizer/adadelta_optimizer.cc
+++ b/paddle/optimizer/adadelta_optimizer.cc
@@ -3,21 +3,14 @@
 
 namespace paddle {
 namespace optimizer {
-template <class T>
-AdadeltaOptimizer<T>::AdadeltaOptimizer(const ::paddle::OptimizerConfig& config)
-    : ParameterOptimizer<T>(config) {
-  rho = config.adadelta().rho();
-  epsilon = config.adadelta().epsilon();
-  decay = config.adadelta().decay();
-}
 
 template <class T>
 void AdadeltaOptimizer<T>::set_weight(const Tensor<T>* p) {
-  size_t size = p->width();
+  size_t size = p->size();
   T* gptr = new T[size];
   accum_gradient = Tensor<T>(gptr, size);
   T* dptr = new T[size];
-  accum_delta = Tensor<T>(dtpr, size);
+  accum_delta = Tensor<T>(dptr, size);
   T* dptr_current = new T[size];
   update_delta = Tensor<T>(dptr_current, size);
 }
@@ -25,8 +18,8 @@ void AdadeltaOptimizer<T>::set_weight(const Tensor<T>* p) {
 template <class T>
 void AdadeltaOptimizer<T>::update(const Tensor<T>& gradient) {
   num_sample_passed += 1;
-  double learning_rate = lr_policy->get_learning_rate();
-  for (size_t i = 0; i < parameter_.size(); ++i) {
+  double learning_rate = lr_policy->get_learning_rate(num_sample_passed);
+  for (size_t i = 0; i < parameter_->size(); ++i) {
     accum_gradient[i] =
         rho * accum_gradient[i] + (1.0 - rho) * gradient[i] * gradient[i];
 
@@ -36,7 +29,8 @@ void AdadeltaOptimizer<T>::update(const Tensor<T>& gradient) {
     accum_delta[i] =
         rho * accum_delta[i] + (1.0 - rho) * update_delta[i] * update_delta[i];
 
-    parameter_[i] -= update_delta[i] + decay * parameter_[i];
+    parameter_[i] -=
+        learning_rate * update_delta[i] + learning_rate * decay * parameter_[i];
   }
 }
 
diff --git a/paddle/optimizer/adadelta_optimizer.h b/paddle/optimizer/adadelta_optimizer.h
index 1a8c03f26827cbf8fce57d2393badc0affcb384c..35f3ff86fcfdf9463be15607a4266d4713f3e31e 100644
--- a/paddle/optimizer/adadelta_optimizer.h
+++ b/paddle/optimizer/adadelta_optimizer.h
@@ -9,7 +9,12 @@ namespace optimizer {
 template <class T>
 class AdadeltaOptimizer : public ParameterOptimizer<T> {
 public:
-  AdadeltaOptimizer(const OptimizerConfig &config);
+  using ParameterOptimizer<T>::parameter_;
+  using ParameterOptimizer<T>::num_sample_passed;
+  using ParameterOptimizer<T>::lr_policy;
+
+  AdadeltaOptimizer(double rho, double epsilon, double decay, BaseLr *lr)
+      : ParameterOptimizer<T>(lr), rho(rho), epsilon(epsilon), decay(decay) {}
   ~AdadeltaOptimizer() {
     if (accum_gradient) delete accum_gradient;
     if (accum_delta) delete accum_delta;
diff --git a/paddle/optimizer/adagrad_optimizer.cc b/paddle/optimizer/adagrad_optimizer.cc
index 40402a671081d0ffb932b18c9d46343e86495ef9..7b451cb4074bcf7257ff1a0654dccf2e106e1716 100644
--- a/paddle/optimizer/adagrad_optimizer.cc
+++ b/paddle/optimizer/adagrad_optimizer.cc
@@ -3,11 +3,6 @@
 namespace paddle {
 namespace optimizer {
 template <class T>
-AdagradOptimizer<T>::AdagradOptimizer(const ::paddle::OptimizerConfig& config)
-    : ParameterOptimizer<T>(config) {
-  epsilon = config.adagrad().epsilon();
-  decay = config.adagrad().decay();
-}
 
 template <class T>
 void AdagradOptimizer<T>::set_weight(const Tensor<T>* p) {
diff --git a/paddle/optimizer/adagrad_optimizer.h b/paddle/optimizer/adagrad_optimizer.h
index 1ec438fd05a5ce6d1eea0e521a8fd1c722af8244..a01040f30f99ff1ef2569ae264b753fa8d7bd5c9 100644
--- a/paddle/optimizer/adagrad_optimizer.h
+++ b/paddle/optimizer/adagrad_optimizer.h
@@ -9,7 +9,11 @@ namespace optimizer {
 template <class T>
 class AdagradOptimizer : public ParameterOptimizer<T> {
 public:
-  AdagradOptimizer(const OptimizerConfig &config);
+  using ParameterOptimizer<T>::parameter_;
+  using ParameterOptimizer<T>::num_sample_passed;
+  using ParameterOptimizer<T>::lr_policy;
+  AdagradOptimizer(double epsilon, double decay, BaseLr *lr)
+      : ParameterOptimizer<T>(lr), epsilon(epsilon), decay(decay) {}
   ~AdagradOptimizer() {
     if (accum_gradient) delete accum_gradient;
   }
diff --git a/paddle/optimizer/adam_optimizer.cc b/paddle/optimizer/adam_optimizer.cc
index c2303c6545e56a00c01b99785d78a3eb47b71d0d..b2d2ddc596ada8275288fc63fb76d344d523a44c 100644
--- a/paddle/optimizer/adam_optimizer.cc
+++ b/paddle/optimizer/adam_optimizer.cc
@@ -2,14 +2,6 @@
 
 namespace paddle {
 namespace optimizer {
-template <class T>
-AdamOptimizer<T>::AdamOptimizer(const ::paddle::OptimizerConfig &config)
-    : ParameterOptimizer<T>(config) {
-  beta_1 = config.adam().beta_1();
-  beta_2 = config.adam().beta_2();
-  epsilon = config.adam().epsilon();
-  decay = config.adam().decay();
-}
 
 template <class T>
 void AdamOptimizer<T>::set_weight(const Tensor<T> *p) {
@@ -23,11 +15,16 @@ void AdamOptimizer<T>::set_weight(const Tensor<T> *p) {
 template <class T>
 void AdamOptimizer<T>::update(const Tensor<T> &gradient) {
   num_sample_passed += 1;
-  double learning_rate = lr_policy->get_learning_rate();
-  for (size_t i = 0; i < parameter_.size(); ++i) {
-    accum_gradient[i] += gradient[i] * gradient[i];
-    parameter_[i] +=
-        learning_rate * (gradient[i] / std::sqrt(accum_gradient[i] + epsilon) +
+  double learning_rate = lr_policy->get_learning_rate(num_sample_passed);
+  double coef1 = 1.0 - std::pow(beta_1, num_sample_passed);
+  double coef2 = 1.0 - std::pow(beta_2, num_sample_passed);
+  learning_rate *= std::sqrt(coef2) / coef1;
+  for (size_t i = 0; i < parameter_->size(); ++i) {
+    momentums_[i] = beta_1 * momentums_[i] + (1.0 - beta_1) * gradient[i];
+    velocitys_[i] =
+        beta_2 * velocitys_[i] + (1.0 - beta_2) * gradient[i] * gradient[i];
+    parameter_[i] -=
+        learning_rate * (momentums_[i] / std::sqrt(velocitys_[i] + epsilon) +
                          decay * parameter_[i]);
   }
 }
diff --git a/paddle/optimizer/adam_optimizer.h b/paddle/optimizer/adam_optimizer.h
index ceec18eb33603ccaabdcdbce1f65b23aed833e94..cf81bd70a64db123ca6e4214b061781a8c510963 100644
--- a/paddle/optimizer/adam_optimizer.h
+++ b/paddle/optimizer/adam_optimizer.h
@@ -9,8 +9,20 @@ namespace optimizer {
 template <class T>
 class AdamOptimizer : public ParameterOptimizer<T> {
 public:
-  AdamOptimizer(const OptimizerConfig &config);
-  ~AdamOptimizer() {}
+  using ParameterOptimizer<T>::parameter_;
+  using ParameterOptimizer<T>::num_sample_passed;
+  using ParameterOptimizer<T>::lr_policy;
+  AdamOptimizer(
+      double beta_1, double beta_2, double epsilon, double decay, BaseLr *lr)
+      : ParameterOptimizer<T>(lr),
+        beta_1(beta_1),
+        beta_2(beta_2),
+        epsilon(epsilon),
+        decay(decay) {}
+  ~AdamOptimizer() {
+    if (momentums_) delete momentums_;
+    if (velocitys_) delete velocitys_;
+  }
   void update(const Tensor<T> &gradient);
   void set_weight(const Tensor<T> *p);
   T *get_weight() const;
diff --git a/paddle/optimizer/lr_policy.h b/paddle/optimizer/lr_policy.h
index 6977b68de7ba788d5ea3b7707364a07ca6bf4f65..5aad87f45fb0619e514de00e65a5ceb9dac0ef01 100644
--- a/paddle/optimizer/lr_policy.h
+++ b/paddle/optimizer/lr_policy.h
@@ -1,19 +1,18 @@
 #ifndef PADDLE_OPTIMIZER_LR_POLICY_H_
 #define PADDLE_OPTIMIZER_LR_POLICY_H_
 
-#include "OptimizerConfig.ph.h"
+#include "OptimizerConfig.pb.h"
 
 namespace paddle {
 namespace optimizer {
 
 class BaseLr {
 public:
-  LrPolicyBase(const OpitmizerConfig &config) {
-    learning_rate = config.lr_config().learning_rate();
-  }
+  BaseLr(double lr) : learning_rate(lr) {}
+  virtual ~BaseLr() {}
   virtual double get_learning_rate(const uint64_t num_sample_passed) = 0;
 
-private:
+protected:
   double learning_rate;
 };
 
diff --git a/paddle/optimizer/optimizer.cc b/paddle/optimizer/optimizer.cc
index e72881e5d0dba8242055f734c7681def22f65962..ff6558147eeb866351f724e559e0e1841ac15718 100644
--- a/paddle/optimizer/optimizer.cc
+++ b/paddle/optimizer/optimizer.cc
@@ -3,7 +3,7 @@
 
 #include "parameter_optimizer.h"
 
-template <class T>
+template <paddle_element_type T>
 struct EnumToType {};
 
 template <class T>
@@ -11,15 +11,14 @@ struct TypeToEnum {};
 
 #define MATCH_ENUM_TYPE(TYPE, ENUM)                  \
   template <>                                        \
-  struct TypeToEnum<ENUM> {                          \
+  struct TypeToEnum<TYPE> {                          \
     static paddle_element_type v() { return ENUM; }; \
-    static constexpr TYPE value = ENUM;
-}
-;
-template <>
-struct EnumToType<ENUM> {
-  typedef TYPE Type;
-}
+    static constexpr TYPE value = ENUM;              \
+  };                                                 \
+  template <>                                        \
+  struct EnumToType<ENUM> {                          \
+    typedef TYPE Type;                               \
+  }
 
 MATCH_ENUM_TYPE(int32_t, PADDLE_ELEMENT_TYPE_INT32);
 MATCH_ENUM_TYPE(uint32_t, PADDLE_ELEMENT_TYPE_UINT32);
@@ -27,11 +26,10 @@ MATCH_ENUM_TYPE(int64_t, PADDLE_ELEMENT_TYPE_INT64);
 MATCH_ENUM_TYPE(uint64_t, PADDLE_ELEMENT_TYPE_UINT64);
 MATCH_ENUM_TYPE(float, PADDLE_ELEMENT_TYPE_FLOAT32);
 MATCH_ENUM_TYPE(double, PADDLE_ELEMENT_TYPE_FLOAT64);
-
-struct paddle_optimizer {
+ struct paddle_optimizer {
   /*! \brief optmizer in C++ side */
 
-  paddle::optimizer::ParameterOptimzier* impl;
+  paddle::optimizer::ParameterOptimizerBase* impl;
 };
 
 paddle_optimizer* paddle_create_optimizer(const unsigned char* config_proto,
@@ -48,7 +46,7 @@ int paddle_release_optimizer(paddle_optimizer* o) {
 }
 
 int paddle_update_parameter(paddle_optimizer* o,
-                            paddle_element_type data_type,
+                            const paddle_element_type data_type,
                             const void* grad_buffer,
                             int num_bytes) {
   auto type = EnumToType<data_type>::Type;
@@ -59,7 +57,7 @@ int paddle_update_parameter(paddle_optimizer* o,
 }
 
 int paddle_optimizer_set_weights(paddle_optimizer* o,
-                                 paddle_element_type data_type,
+                                 const paddle_element_type data_type,
                                  void* param_buffer,
                                  int num_bytes) {
   auto type = EnumToType<data_type>::Type;
diff --git a/paddle/optimizer/optimizer.h b/paddle/optimizer/optimizer.h
index 0eba2e781187ccc894134aa69bfc7f8d896645d1..a2c2b13405b296e773ba6f8d5a480e9a39bf7e5a 100644
--- a/paddle/optimizer/optimizer.h
+++ b/paddle/optimizer/optimizer.h
@@ -64,7 +64,7 @@ int paddle_release_optimizer(paddle_optimizer* o);
  *  @return return exec status
  */
 int paddle_update_parameter(paddle_optimizer* o,
-                            paddle_element_type data_type,
+                            const paddle_element_type data_type,
                             const void* gradient,
                             int num_bytes);
 
@@ -76,7 +76,7 @@ int paddle_update_parameter(paddle_optimizer* o,
  *  @return return exec status
  */
 int paddle_optimizer_set_weights(paddle_optimizer* o,
-                                 paddle_element_type data_type,
+                                 const paddle_element_type data_type,
                                  void* param_buffer,
                                  int num_bytes);
 
diff --git a/paddle/optimizer/parameter_optimizer.cc b/paddle/optimizer/parameter_optimizer.cc
index c5e9e0acc30300c07200aad708a5591eba335a6c..4bd384d77da1deb7f86c72cca6f66947eddb726f 100644
--- a/paddle/optimizer/parameter_optimizer.cc
+++ b/paddle/optimizer/parameter_optimizer.cc
@@ -1,6 +1,11 @@
-#include "parameter_optimizer.h"
 #include <glog/logging.h>
-#include "optimizer_factory.h"
+#include "adadelta_optimizer.h"
+#include "adagrad_optimizer.h"
+#include "adam_optimizer.h"
+#include "lr_policy.h"
+#include "sgd_optimizer.h"
+
+#include "parameter_optimizer.h"
 
 namespace paddle {
 namespace optimizer {
@@ -12,29 +17,40 @@ ParameterOptimizer<T> *ParameterOptimizer<T>::create(
   CHECK(config.ParseFromString(config_proto) == 0)
       << "error : optimizer config";
   CHECK(config_valid(config) == 0) << "error : invalid optimizer config ";
+
+  BaseLr *lr = nullptr;
+  switch (config.lr_policy()) {
+    case "ConstLr":
+      lr = new ConstLr(config.lr_config().learning_rate());
+      break;
+  }
   ParameterOptimizer<T> *opt = nullptr;
   switch (config.optimizer_name()) {
     case "SGD":
-      opt = new SGDOptimizer<T>(config);
+      opt = new SGDOptimizer<T>(config.sgd().momentum(),
+                                config.sgd().decay(),
+                                config.sgd().nesterov(),
+                                lr);
       break;
     case "Adagrad":
-      opt = new AdagradOptimizer<T>(config);
+      opt = new AdagradOptimizer<T>(
+          config.adagrad().epsilon(), config.adagrad().decay(), lr);
       break;
     case "Adadelta":
-      opt = new AdadeltaOptimizer<T>(config);
+      opt = new AdadeltaOptimizer<T>(config.adadelta().rho(),
+                                     config.adadelta().epsilon(),
+                                     config.adadelta().decay(),
+                                     lr);
       break;
     case "Adam":
-      opt = new AdamOptimizer<T>(config);
+      opt = new AdamOptimizer<T>(config.adam().beta_1(),
+                                 config.adam().beta_2(),
+                                 config.adam().epsilon(),
+                                 config.adam().decay(),
+                                 lr);
       break;
-    default:
-      opt = new SGDOptimizer<T>(config);
   }
 
-  switch (config.lr_policy()) {
-    case "ConstLr":
-      opt.lr_policy = new ConstLr(config);
-      break;
-  }
   return opt;
 }
 
diff --git a/paddle/optimizer/parameter_optimizer.h b/paddle/optimizer/parameter_optimizer.h
index d5914857af06a9fa077d0c8d33669d7978ff5681..40994aa86703b0437f0795f1c0323c26596c564a 100644
--- a/paddle/optimizer/parameter_optimizer.h
+++ b/paddle/optimizer/parameter_optimizer.h
@@ -11,6 +11,12 @@
 namespace paddle {
 namespace optimizer {
 
+class ParameterOptimizerBase {
+private:
+  ParameterOptimizerBase(const ParameterOptimizerBase &) = delete;
+  ParameterOptimizerBase &operator=(const ParameterOptimizerBase &) = delete;
+};
+
 template <class T>
 class ParameterOptimizer {
 public:
@@ -18,18 +24,18 @@ public:
    * @brief  update hook for algorithm need to traverse parameter more than
    * once.
    */
+  // use config for pack trainig state
   ParameterOptimizer(const OptimizerConfig &config) : config_(config){};
 
+  ParameterOptimizer(BaseLr *lr) : lr_policy(lr), num_sample_passed(0) {}
+  virtual ~ParameterOptimizer() { delete parameter_; };
+
   static ParameterOptimizer *create(const ::std::string &config_proto);
-  virtual void update(const Tensor &gradient) = 0;
-  virtual void destroy() = 0;
+  virtual void update(const Tensor<T> &gradient) = 0;
   virtual T *get_weight() const;
   virtual void set_weight(const Tensor<T> *parameter);
-  // package optimizer config proto in runtime for saving checkpoint
-  virtual char *get_config_proto();
-  ~ParameterOptimzier() { delete parameter_; }
 
-private:
+public:
   bool config_valid(::std::string &config) const;
   OptimizerConfig config_;
   Tensor<T> *parameter_;
@@ -37,12 +43,6 @@ private:
   // learning rate policy
   BaseLr *lr_policy;
   uint64_t num_sample_passed;
-
-  ParameterOptimizer(const ParameterOptimizer &) = delete;
-  ParameterOptimizer &operator=(const ParameterOptimizer &) = delete;
-  /**
-   * @brief indicate if use L1, L2 regularizer
-   */
 };
 
 }  // namespace optimizer
diff --git a/paddle/optimizer/regularizer.cc b/paddle/optimizer/regularizer.cc
index dd21c20e711940242abb31a0c169e5f1026cecf8..5724511a827f4521a31c05f38483490fe094e7fa 100644
--- a/paddle/optimizer/regularizer.cc
+++ b/paddle/optimizer/regularizer.cc
@@ -19,6 +19,8 @@ Regularizer<T>* Regularizer<T>::create(const std::string& config) {
 
 template class L1Regularizer<float>;
 template class L1Regularizer<double>;
+template class L2Regularizer<float>;
+template class L2Regularizer<double>;
 
 }  // namespace optimizer
 }  // namespace paddle
diff --git a/paddle/optimizer/sgd_optimizer.h b/paddle/optimizer/sgd_optimizer.h
index 4e1d9669c96c73f2152179eee90b0a765e809b8e..5115825590d82baded7e2384ed54f5bd75402058 100644
--- a/paddle/optimizer/sgd_optimizer.h
+++ b/paddle/optimizer/sgd_optimizer.h
@@ -9,8 +9,18 @@ namespace optimizer {
 template <class T>
 class SGDOptimizer : public ParameterOptimizer<T> {
 public:
-  SGDOptimizer(const ::paddle::OptimizerConfig& config);
-  ~SGDOptimizer() {
+  using ParameterOptimizer<T>::parameter_;
+  using ParameterOptimizer<T>::num_sample_passed;
+  using ParameterOptimizer<T>::lr_policy;
+
+  SGDOptimizer(double m,
+               double d,
+               bool n,
+               double learning_rate,
+               uint64_t num_sample_passed,
+               BaseLr* lr)
+      : ParameterOptimizer<T>(lr), momentum(m), decay(d), nesterov(n) {}
+  virtual ~SGDOptimizer() {
     // clear memory by Tensor library
     delete momentums_;
   }
@@ -18,7 +28,6 @@ public:
 
   void set_weight(const Tensor<T>* p);
   T* get_weight() const;
-  char* get_config_proto();
 
 private:
   Tensor<T>* momentums_;
diff --git a/paddle/optimizer/sgd_optmizer.cc b/paddle/optimizer/sgd_optmizer.cc
index ff23d46dc6f713a062f0841a854bb6a538907085..cd1635fecdca0cf9803849ff3a6a4b6eb265c32f 100644
--- a/paddle/optimizer/sgd_optmizer.cc
+++ b/paddle/optimizer/sgd_optmizer.cc
@@ -3,18 +3,10 @@
 namespace paddle {
 namespace optimizer {
 
-template <class T>
-SGDOptimizer<T>::SGDOptimizer(const ::paddle::OptimizerConfig &config)
-    : ParameterOptimizer<T>(config) {
-  momentum = config.sgd().momentum();
-  decay = config.sgd().decay();
-  nesterov = config.sgd().nesterov();
-}
-
 template <class T>
 void SGDOptimizer<T>::set_weight(const Tensor<T> *p) {
   //  ParameterOptimizer::set_weight(p);
-  size_t size = p->width();
+  size_t size = p->size();
   // TODO: fix it with align aware allocator bind to Tensor
   if (momentum != 0.0) {
     T *ptr = new T[size];
@@ -27,7 +19,7 @@ void SGDOptimizer<T>::update(const Tensor<T> &gradient) {
   num_sample_passed += 1;
   double learning_rate = lr_policy->get_learning_rate(num_sample_passed);
   double velocity = 0.0;
-  for (size_t i = 0; i < parameter_.size(); ++i) {
+  Tensor<T> &for (size_t i = 0; i < parameter_->size(); ++i) {
     if (momentum == 0.0) {
       velocity =
           -learning_rate * gradient[i] - learning_rate * decay * parameter_[i];
@@ -44,15 +36,6 @@ void SGDOptimizer<T>::update(const Tensor<T> &gradient) {
   }
 }
 
-template <class T>
-char *SGDOptimizer<T>::get_config_proto() {
-  ParameterOptimizer::get_config_proto();
-  config.set_learning_rate(learning_rate);
-  config.set_decay(decay);
-  config.set_nesterov(nesterov);
-  return config.SerializeAsString().c_str();
-}
-
 template class SGDOptimizer<float>;
 template class SGDOptimizer<double>;
 
diff --git a/proto/OptimizerConfig.proto b/proto/OptimizerConfig.proto
index c1080f4e168a363ca1d637834629206a3513a5bc..d42426765073a1d27b265d2ef5feff94535cdf48 100644
--- a/proto/OptimizerConfig.proto
+++ b/proto/OptimizerConfig.proto
@@ -12,7 +12,7 @@ message SGDConfig {
   optional double momentum = 21 [default = 0.0];
   optional double decay = 23 [default = 0.0];
   optional bool nesterov =24 [default = false];
-
+}
 
 
 message AdadeltaConfig {
@@ -95,5 +95,4 @@ message OptimizerConfig {
   // common config of optimizer
   optional double clipnorm = 101;
   optional double clipvalue = 102;
-
 }