diff --git a/python/paddle/fluid/layers/nn.py b/python/paddle/fluid/layers/nn.py
index 6688c0e99fb12f6a1867d6345a72233d68e8d0d4..d3b5f13b577099afb9545b5177fbf7e07f9a8e45 100644
--- a/python/paddle/fluid/layers/nn.py
+++ b/python/paddle/fluid/layers/nn.py
@@ -7472,7 +7472,7 @@ def space_to_depth(x, stride, name=None):
 
     Args:
         x(variable): The input LoDtensor.
-        stride(variable): The stride to space_to_depth
+        stride(variable): The stride to select the element on each feature map
 
     Returns:
         Variable: The output LoDtensor.