diff --git a/parakeet/models/transformerTTS/post_convnet.py b/parakeet/models/transformerTTS/post_convnet.py
new file mode 100644
index 0000000..7ed905b
--- /dev/null
+++ b/parakeet/models/transformerTTS/post_convnet.py
@@ -0,0 +1,89 @@
+import math
+import paddle.fluid.dygraph as dg
+import paddle.fluid as fluid
+import paddle.fluid.layers as layers
+from parakeet.modules.customized import Conv1D
+
+class PostConvNet(dg.Layer):
+    def __init__(self, 
+                 n_mels=80,
+                 num_hidden=512,
+                 filter_size=5,
+                 padding=0,
+                 num_conv=5,
+                 outputs_per_step=1,
+                 use_cudnn=True,
+                 dropout=0.1,
+                 batchnorm_last=False):
+        super(PostConvNet, self).__init__()
+        
+        self.dropout = dropout
+        self.num_conv = num_conv
+        self.batchnorm_last = batchnorm_last
+        self.conv_list = []
+        k = math.sqrt(1 / (n_mels * outputs_per_step))
+        self.conv_list.append(Conv1D(in_channels = n_mels * outputs_per_step,
+                            out_channels = num_hidden,
+                            filter_size = filter_size,
+                            padding = padding,
+                            param_attr = fluid.ParamAttr(initializer=fluid.initializer.XavierInitializer()),
+                            bias_attr = fluid.ParamAttr(initializer=fluid.initializer.Uniform(low=-k, high=k)),
+                            use_cudnn = use_cudnn,
+                            data_format = "NCT"))
+
+        k = math.sqrt(1 / num_hidden)
+        for _ in range(1, num_conv-1):
+            self.conv_list.append(Conv1D(in_channels = num_hidden,
+                                out_channels = num_hidden,
+                                filter_size = filter_size,
+                                padding = padding,
+                                param_attr = fluid.ParamAttr(initializer=fluid.initializer.XavierInitializer()),
+                                bias_attr = fluid.ParamAttr(initializer=fluid.initializer.Uniform(low=-k, high=k)),
+                                use_cudnn = use_cudnn,
+                                data_format = "NCT") )
+
+        self.conv_list.append(Conv1D(in_channels = num_hidden,
+                            out_channels = n_mels * outputs_per_step,
+                            filter_size = filter_size,
+                            padding = padding,
+                            param_attr = fluid.ParamAttr(initializer=fluid.initializer.XavierInitializer()),
+                            bias_attr = fluid.ParamAttr(initializer=fluid.initializer.Uniform(low=-k, high=k)),
+                            use_cudnn = use_cudnn,
+                            data_format = "NCT"))
+
+        for i, layer in enumerate(self.conv_list):
+            self.add_sublayer("conv_list_{}".format(i), layer)
+
+        self.batch_norm_list = [dg.BatchNorm(num_hidden, 
+                            data_layout='NCHW') for _ in range(num_conv-1)]
+        if self.batchnorm_last:
+            self.batch_norm_list.append(dg.BatchNorm(n_mels * outputs_per_step, 
+                                data_layout='NCHW'))
+        for i, layer in enumerate(self.batch_norm_list):
+            self.add_sublayer("batch_norm_list_{}".format(i), layer)
+        
+
+    def forward(self, input):
+        """
+        Post Conv Net.
+        
+        Args:
+            input (Variable): Shape(B, T, C), dtype: float32. The input value.
+        Returns:
+            output (Variable), Shape(B, T, C), the result after postconvnet.
+        """
+        
+        input = layers.transpose(input, [0,2,1])
+        len = input.shape[-1]
+        for i in range(self.num_conv-1):
+            batch_norm = self.batch_norm_list[i]
+            conv = self.conv_list[i]
+            
+            input = layers.dropout(layers.tanh(batch_norm(conv(input)[:,:,:len])), self.dropout)
+        conv = self.conv_list[self.num_conv-1]
+        input = conv(input)[:,:,:len]
+        if self.batchnorm_last:
+            batch_norm = self.batch_norm_list[self.num_conv-1]
+            input = layers.dropout(batch_norm(input), self.dropout)
+        output = layers.transpose(input, [0,2,1])
+        return output
\ No newline at end of file
diff --git a/parakeet/models/transformerTTS/prenet.py b/parakeet/models/transformerTTS/prenet.py
new file mode 100644
index 0000000..e9b0667
--- /dev/null
+++ b/parakeet/models/transformerTTS/prenet.py
@@ -0,0 +1,39 @@
+import math
+import paddle.fluid.dygraph as dg
+import paddle.fluid as fluid
+import paddle.fluid.layers as layers
+
+class PreNet(dg.Layer):
+    def __init__(self, input_size, hidden_size, output_size, dropout_rate=0.2):
+        """
+        :param input_size: dimension of input
+        :param hidden_size: dimension of hidden unit
+        :param output_size: dimension of output
+        """
+        super(PreNet, self).__init__()
+        self.input_size = input_size
+        self.hidden_size = hidden_size
+        self.output_size = output_size
+        self.dropout_rate = dropout_rate
+
+        k = math.sqrt(1 / input_size)
+        self.linear1 = dg.Linear(input_size, hidden_size,
+                              param_attr=fluid.ParamAttr(initializer = fluid.initializer.XavierInitializer()),
+                              bias_attr=fluid.ParamAttr(initializer = fluid.initializer.Uniform(low=-k, high=k)))
+        k = math.sqrt(1 / hidden_size)
+        self.linear2 = dg.Linear(hidden_size, output_size,
+                              param_attr=fluid.ParamAttr(initializer = fluid.initializer.XavierInitializer()),
+                              bias_attr=fluid.ParamAttr(initializer = fluid.initializer.Uniform(low=-k, high=k)))
+
+    def forward(self, x):
+        """
+        Pre Net before passing through the network.
+        
+        Args:
+            x (Variable): Shape(B, T, C), dtype: float32. The input value.
+        Returns:
+            x (Variable), Shape(B, T, C), the result after pernet.
+        """
+        x = layers.dropout(layers.relu(self.linear1(x)), self.dropout_rate)
+        x = layers.dropout(layers.relu(self.linear2(x)), self.dropout_rate)
+        return x
diff --git a/parakeet/modules/customized.py b/parakeet/modules/customized.py
new file mode 100644
index 0000000..e0eb65a
--- /dev/null
+++ b/parakeet/modules/customized.py
@@ -0,0 +1,117 @@
+from paddle import fluid
+import paddle.fluid.dygraph as dg
+
+class Conv1D(dg.Layer):
+    """
+    A convolution 1D block implemented with Conv2D. Form simplicity and 
+    ensuring the output has the same length as the input, it does not allow 
+    stride > 1.
+    """
+
+    def __init__(self,
+                 in_channels,
+                 out_channels,
+                 filter_size=3,
+                 padding=0,
+                 dilation=1,
+                 stride=1,
+                 groups=None,
+                 param_attr=None,
+                 bias_attr=None,
+                 use_cudnn=True,
+                 act=None,
+                 data_format='NCT',
+                 dtype="float32"):
+        super(Conv1D, self).__init__(dtype=dtype)
+
+        self.padding = padding
+        self.in_channels = in_channels
+        self.num_filters = out_channels
+        self.filter_size = filter_size
+        self.stride = stride
+        self.dilation = dilation
+        self.padding = padding
+        self.act = act
+        self.data_format = data_format
+
+        self.conv = dg.Conv2D(
+            num_channels=in_channels,
+            num_filters=out_channels,
+            filter_size=(1, filter_size),
+            stride=(1, stride),
+            dilation=(1, dilation),
+            padding=(0, padding),
+            groups=groups,
+            param_attr=param_attr,
+            bias_attr=bias_attr,
+            use_cudnn=use_cudnn,
+            act=act,
+            dtype=dtype)
+
+    def forward(self, x):
+        """
+        Args:
+            x (Variable): Shape(B, C_in, 1, T), the input, where C_in means
+                input channels.
+        Returns:
+            x (Variable): Shape(B, C_out, 1, T), the outputs, where C_out means
+                output channels (num_filters).
+        """
+        if self.data_format == 'NTC':
+            x = fluid.layers.transpose(x, [0, 2, 1])
+        x = fluid.layers.unsqueeze(x, [2])
+        x = self.conv(x)
+        x = fluid.layers.squeeze(x, [2])
+        if self.data_format == 'NTC':
+            x = fluid.layers.transpose(x, [0, 2, 1])
+        return x
+
+class Pool1D(dg.Layer):
+    """
+    A Pool 1D block implemented with Pool2D.
+    """
+    def __init__(self,
+                 pool_size=-1, 
+                 pool_type='max', 
+                 pool_stride=1, 
+                 pool_padding=0, 
+                 global_pooling=False, 
+                 use_cudnn=True, 
+                 ceil_mode=False, 
+                 exclusive=True,
+                 data_format='NCT'):
+        super(Pool1D, self).__init__()
+        self.pool_size = pool_size
+        self.pool_type = pool_type
+        self.pool_stride = pool_stride
+        self.pool_padding = pool_padding
+        self.global_pooling = global_pooling
+        self.use_cudnn = use_cudnn
+        self.ceil_mode = ceil_mode
+        self.exclusive = exclusive
+        self.data_format = data_format
+
+
+        self.pool2d = dg.Pool2D([1,pool_size], pool_type = pool_type,
+                                pool_stride = [1,pool_stride], pool_padding = [0, pool_padding],
+                                global_pooling = global_pooling, use_cudnn = use_cudnn,
+                                ceil_mode = ceil_mode, exclusive = exclusive)
+
+    
+    def forward(self, x):
+        """
+        Args:
+            x (Variable): Shape(B, C_in, 1, T), the input, where C_in means
+                input channels.
+        Returns:
+            x (Variable): Shape(B, C_out, 1, T), the outputs, where C_out means
+                output channels (num_filters).
+        """
+        if self.data_format == 'NTC':
+            x = fluid.layers.transpose(x, [0, 2, 1])
+        x = fluid.layers.unsqueeze(x, [2])
+        x = self.pool2d(x)
+        x = fluid.layers.squeeze(x, [2])
+        if self.data_format == 'NTC':
+            x = fluid.layers.transpose(x, [0, 2, 1])
+        return x
diff --git a/parakeet/modules/dynamic_gru.py b/parakeet/modules/dynamic_gru.py
new file mode 100644
index 0000000..e84c598
--- /dev/null
+++ b/parakeet/modules/dynamic_gru.py
@@ -0,0 +1,52 @@
+import paddle.fluid.dygraph as dg
+import paddle.fluid.layers as layers
+
+class DynamicGRU(dg.Layer):
+    def __init__(self,
+                 size,
+                 param_attr=None,
+                 bias_attr=None,
+                 is_reverse=False,
+                 gate_activation='sigmoid',
+                 candidate_activation='tanh',
+                 h_0=None,
+                 origin_mode=False,
+                 init_size=None):
+        super(DynamicGRU, self).__init__()
+        self.gru_unit = dg.GRUUnit(
+            size * 3,
+            param_attr=param_attr,
+            bias_attr=bias_attr,
+            activation=candidate_activation,
+            gate_activation=gate_activation,
+            origin_mode=origin_mode)
+        self.size = size
+        self.h_0 = h_0
+        self.is_reverse = is_reverse
+
+    def forward(self, inputs):
+        """
+        Dynamic GRU block.
+        
+        Args:
+            input (Variable): Shape(B, T, C), dtype: float32. The input value.
+        Returns:
+            output (Variable), Shape(B, T, C), the result compute by GRU.
+        """
+        hidden = self.h_0
+        res = []
+        for i in range(inputs.shape[1]):
+            if self.is_reverse:
+                i = inputs.shape[1] - 1 - i
+            input_ = inputs[:, i:i + 1, :]
+            input_ = layers.reshape(
+                input_, [-1, input_.shape[2]], inplace=False)
+            hidden, reset, gate = self.gru_unit(input_, hidden)
+            hidden_ = layers.reshape(
+                hidden, [-1, 1, hidden.shape[1]], inplace=False)
+            res.append(hidden_)
+        if self.is_reverse:
+            res = res[::-1]
+        res = layers.concat(res, axis=1)
+        return res
+
diff --git a/parakeet/modules/ffn.py b/parakeet/modules/ffn.py
new file mode 100644
index 0000000..7b06dcb
--- /dev/null
+++ b/parakeet/modules/ffn.py
@@ -0,0 +1,57 @@
+import paddle.fluid.dygraph as dg
+import paddle.fluid.layers as layers
+import paddle.fluid as fluid
+import math
+from parakeet.modules.customized import Conv1D
+
+
+class PositionwiseFeedForward(dg.Layer):
+    ''' A two-feed-forward-layer module '''
+    def __init__(self, d_in, num_hidden, filter_size, padding=0, use_cudnn=True, dropout=0.1):
+        super(PositionwiseFeedForward, self).__init__()
+        self.num_hidden = num_hidden
+        self.use_cudnn = use_cudnn
+        self.dropout = dropout
+
+        k = math.sqrt(1 / d_in)
+        self.w_1 = Conv1D(in_channels = d_in, 
+                        out_channels = num_hidden, 
+                        filter_size = filter_size,
+                        padding=padding,
+                        param_attr = fluid.ParamAttr(initializer=fluid.initializer.XavierInitializer()),
+                        bias_attr = fluid.ParamAttr(initializer=fluid.initializer.Uniform(low=-k, high=k)),
+                        use_cudnn = use_cudnn,
+                        data_format = "NTC")
+        k = math.sqrt(1 / num_hidden)
+        self.w_2 = Conv1D(in_channels = num_hidden,
+                        out_channels = d_in,
+                        filter_size = filter_size,
+                        padding=padding,
+                        param_attr = fluid.ParamAttr(initializer=fluid.initializer.XavierInitializer()),
+                        bias_attr = fluid.ParamAttr(initializer=fluid.initializer.Uniform(low=-k, high=k)),
+                        use_cudnn = use_cudnn,
+                        data_format = "NTC")
+        self.layer_norm = dg.LayerNorm(d_in)
+
+    def forward(self, input):
+        """
+        Feed Forward Network.
+        
+        Args:
+            input (Variable): Shape(B, T, C), dtype: float32. The input value.
+        Returns:
+            output (Variable), Shape(B, T, C), the result after FFN.
+        """
+        #FFN Networt
+        x = self.w_2(layers.relu(self.w_1(input)))
+        
+        # dropout
+        x = layers.dropout(x, self.dropout)
+
+        # residual connection
+        x = x + input
+        
+        #layer normalization
+        output = self.layer_norm(x)
+
+        return output
\ No newline at end of file