diff --git a/paddlespeech/t2s/models/melgan/style_melgan_updater.py b/paddlespeech/t2s/models/melgan/style_melgan_updater.py
index 49054aa7..b0cb4ed6 100644
--- a/paddlespeech/t2s/models/melgan/style_melgan_updater.py
+++ b/paddlespeech/t2s/models/melgan/style_melgan_updater.py
@@ -40,8 +40,9 @@ class StyleMelGANUpdater(StandardUpdater):
                  criterions: Dict[str, Layer],
                  schedulers: Dict[str, LRScheduler],
                  dataloader: DataLoader,
-                 discriminator_train_start_steps: int,
-                 lambda_adv: float,
+                 generator_train_start_steps: int=0,
+                 discriminator_train_start_steps: int=100000,
+                 lambda_adv: float=1.0,
                  lambda_aux: float=1.0,
                  output_dir: Path=None):
         self.models = models
@@ -63,11 +64,12 @@ class StyleMelGANUpdater(StandardUpdater):
 
         self.dataloader = dataloader
 
+        self.generator_train_start_steps = generator_train_start_steps
         self.discriminator_train_start_steps = discriminator_train_start_steps
         self.lambda_adv = lambda_adv
         self.lambda_aux = lambda_aux
-        self.state = UpdaterState(iteration=0, epoch=0)
 
+        self.state = UpdaterState(iteration=0, epoch=0)
         self.train_iterator = iter(self.dataloader)
 
         log_file = output_dir / 'worker_{}.log'.format(dist.get_rank())
@@ -79,42 +81,45 @@ class StyleMelGANUpdater(StandardUpdater):
     def update_core(self, batch):
         self.msg = "Rank: {}, ".format(dist.get_rank())
         losses_dict = {}
-
         # parse batch
         wav, mel = batch
+
         # Generator
-        # (B, out_channels, T ** prod(upsample_scales)
-        wav_ = self.generator(mel)
+        if self.state.iteration > self.generator_train_start_steps:
+            # (B, out_channels, T ** prod(upsample_scales)
+            wav_ = self.generator(mel)
 
-        # initialize
-        gen_loss = 0.0
+            # initialize
+            gen_loss = 0.0
+            aux_loss = 0.0
 
-        # full band Multi-resolution stft loss
-        sc_loss, mag_loss = self.criterion_stft(wav_, wav)
-        gen_loss += sc_loss + mag_loss
-        report("train/spectral_convergence_loss", float(sc_loss))
-        report("train/log_stft_magnitude_loss", float(mag_loss))
-        losses_dict["spectral_convergence_loss"] = float(sc_loss)
-        losses_dict["log_stft_magnitude_loss"] = float(mag_loss)
+            # full band multi-resolution stft loss
+            sc_loss, mag_loss = self.criterion_stft(wav_, wav)
+            aux_loss += sc_loss + mag_loss
+            report("train/spectral_convergence_loss", float(sc_loss))
+            report("train/log_stft_magnitude_loss", float(mag_loss))
+            losses_dict["spectral_convergence_loss"] = float(sc_loss)
+            losses_dict["log_stft_magnitude_loss"] = float(mag_loss)
 
-        gen_loss *= self.lambda_aux
+            gen_loss += aux_loss * self.lambda_aux
 
-        ## Adversarial loss
-        if self.state.iteration > self.discriminator_train_start_steps:
-            p_ = self.discriminator(wav_)
-            adv_loss = self.criterion_gen_adv(p_)
-            report("train/adversarial_loss", float(adv_loss))
-            losses_dict["adversarial_loss"] = float(adv_loss)
-            gen_loss += self.lambda_adv * adv_loss
+            # adversarial loss
+            if self.state.iteration > self.discriminator_train_start_steps:
+                p_ = self.discriminator(wav_)
+                adv_loss = self.criterion_gen_adv(p_)
+                report("train/adversarial_loss", float(adv_loss))
+                losses_dict["adversarial_loss"] = float(adv_loss)
 
-        report("train/generator_loss", float(gen_loss))
-        losses_dict["generator_loss"] = float(gen_loss)
+                gen_loss += self.lambda_adv * adv_loss
 
-        self.optimizer_g.clear_grad()
-        gen_loss.backward()
+            report("train/generator_loss", float(gen_loss))
+            losses_dict["generator_loss"] = float(gen_loss)
 
-        self.optimizer_g.step()
-        self.scheduler_g.step()
+            self.optimizer_g.clear_grad()
+            gen_loss.backward()
+
+            self.optimizer_g.step()
+            self.scheduler_g.step()
 
         # Disctiminator
         if self.state.iteration > self.discriminator_train_start_steps:
@@ -148,7 +153,7 @@ class StyleMelGANEvaluator(StandardEvaluator):
                  models: Dict[str, Layer],
                  criterions: Dict[str, Layer],
                  dataloader: DataLoader,
-                 lambda_adv: float,
+                 lambda_adv: float=1.0,
                  lambda_aux: float=1.0,
                  output_dir: Path=None):
         self.models = models
@@ -161,6 +166,7 @@ class StyleMelGANEvaluator(StandardEvaluator):
         self.criterion_dis_adv = criterions["dis_adv"]
 
         self.dataloader = dataloader
+
         self.lambda_adv = lambda_adv
         self.lambda_aux = lambda_aux
 
@@ -171,26 +177,27 @@ class StyleMelGANEvaluator(StandardEvaluator):
         self.msg = ""
 
     def evaluate_core(self, batch):
-        # logging.debug("Evaluate: ")
         self.msg = "Evaluate: "
         losses_dict = {}
-
         wav, mel = batch
+
         # Generator
         # (B, out_channels, T ** prod(upsample_scales)
         wav_ = self.generator(mel)
 
-        ## Adversarial loss
+        # initialize
+        gen_loss = 0.0
+        aux_loss = 0.0
+
+        # adversarial loss
         p_ = self.discriminator(wav_)
         adv_loss = self.criterion_gen_adv(p_)
-
         report("eval/adversarial_loss", float(adv_loss))
         losses_dict["adversarial_loss"] = float(adv_loss)
-        gen_loss = self.lambda_adv * adv_loss
 
-        # initialize
-        aux_loss = 0.0
-        # Multi-resolution stft loss
+        gen_loss += self.lambda_adv * adv_loss
+
+        # multi-resolution stft loss
         sc_loss, mag_loss = self.criterion_stft(wav_, wav)
         aux_loss += sc_loss + mag_loss
         report("eval/spectral_convergence_loss", float(sc_loss))
@@ -198,8 +205,7 @@ class StyleMelGANEvaluator(StandardEvaluator):
         losses_dict["spectral_convergence_loss"] = float(sc_loss)
         losses_dict["log_stft_magnitude_loss"] = float(mag_loss)
 
-        aux_loss *= self.lambda_aux
-        gen_loss += aux_loss
+        gen_loss += aux_loss * self.lambda_aux
 
         report("eval/generator_loss", float(gen_loss))
         losses_dict["generator_loss"] = float(gen_loss)