diff --git a/doc/fluid/api_cn/layers_cn/pad2d_cn.rst b/doc/fluid/api_cn/layers_cn/pad2d_cn.rst
index 9febca74dbc163af275d6b118970fbddfc79ca2b..364d3a11bf9fd6fa360831588d62fc14f141fe3d 100644
--- a/doc/fluid/api_cn/layers_cn/pad2d_cn.rst
+++ b/doc/fluid/api_cn/layers_cn/pad2d_cn.rst
@@ -55,5 +55,5 @@ pad2d
 .. code-block:: python
 
     import paddle.fluid as fluid
-    data = fluid.data(name='data', shape=[1, 1, 2, 3], dtype='float32')
+    data = fluid.data(name='data', shape=[None, 3, 32, 32], dtype='float32')
     result = fluid.layers.pad2d(input=data, paddings=[0, 1, 2, 3], mode='reflect')
diff --git a/doc/fluid/api_cn/layers_cn/pad_cn.rst b/doc/fluid/api_cn/layers_cn/pad_cn.rst
index f81fe33cd42fade797849e59042c445e948ac4cd..38acffa6479cc27ac082d616f75e867d7c81bb8d 100644
--- a/doc/fluid/api_cn/layers_cn/pad_cn.rst
+++ b/doc/fluid/api_cn/layers_cn/pad_cn.rst
@@ -42,7 +42,7 @@ pad
 
     # x 为一个秩为2的张量
     import paddle.fluid as fluid
-    x = fluid.data(name='data', shape=[2, 2], dtype='float32')
+    x = fluid.data(name='data', shape=[300, 300], dtype='float32')
     out = fluid.layers.pad(x=x, paddings=[0, 1, 1, 2], pad_value=0.)