diff --git a/dygraph/paddleseg/models/common/layer_libs.py b/dygraph/paddleseg/models/common/layer_libs.py
index ab0d490726db3911d41b54686b54d69a160c38d7..deb12a16092eb1f4c9483db1135e4a73e7fabe66 100644
--- a/dygraph/paddleseg/models/common/layer_libs.py
+++ b/dygraph/paddleseg/models/common/layer_libs.py
@@ -20,18 +20,18 @@ from paddle.nn import Conv2d
 from paddle.nn import SyncBatchNorm as BatchNorm
 
 
-class ConvBNRelu(nn.Layer):
+class ConvBNReLU(nn.Layer):
     def __init__(self, in_channels, out_channels, kernel_size, **kwargs):
 
-        super(ConvBNRelu, self).__init__()
+        super(ConvBNReLU, self).__init__()
 
-        self.conv = Conv2d(in_channels, out_channels, kernel_size, **kwargs)
+        self._conv = Conv2d(in_channels, out_channels, kernel_size, **kwargs)
 
-        self.batch_norm = BatchNorm(out_channels)
+        self._batch_norm = BatchNorm(out_channels)
 
     def forward(self, x):
-        x = self.conv(x)
-        x = self.batch_norm(x)
+        x = self._conv(x)
+        x = self._batch_norm(x)
         x = F.relu(x)
         return x
 
@@ -40,14 +40,12 @@ class ConvBN(nn.Layer):
     def __init__(self, in_channels, out_channels, kernel_size, **kwargs):
 
         super(ConvBN, self).__init__()
-
-        self.conv = Conv2d(in_channels, out_channels, kernel_size, **kwargs)
-
-        self.batch_norm = BatchNorm(out_channels)
+        self._conv = Conv2d(in_channels, out_channels, kernel_size, **kwargs)
+        self._batch_norm = BatchNorm(out_channels)
 
     def forward(self, x):
-        x = self.conv(x)
-        x = self.batch_norm(x)
+        x = self._conv(x)
+        x = self._batch_norm(x)
         return x
 
 
@@ -69,16 +67,16 @@ class ConvReluPool(nn.Layer):
         return x
 
 
-class DepthwiseConvBNRelu(nn.Layer):
+class DepthwiseConvBNReLU(nn.Layer):
     def __init__(self, in_channels, out_channels, kernel_size, **kwargs):
-        super(DepthwiseConvBNRelu, self).__init__()
+        super(DepthwiseConvBNReLU, self).__init__()
         self.depthwise_conv = ConvBN(
             in_channels,
             out_channels=in_channels,
             kernel_size=kernel_size,
             groups=in_channels,
             **kwargs)
-        self.piontwise_conv = ConvBNRelu(
+        self.piontwise_conv = ConvBNReLU(
             in_channels, out_channels, kernel_size=1, groups=1)
 
     def forward(self, x):
@@ -105,7 +103,7 @@ class AuxLayer(nn.Layer):
                  dropout_prob=0.1):
         super(AuxLayer, self).__init__()
 
-        self.conv_bn_relu = ConvBNRelu(
+        self.conv_bn_relu = ConvBNReLU(
             in_channels=in_channels,
             out_channels=inter_channels,
             kernel_size=3,