diff --git a/python/paddle/fluid/reader.py b/python/paddle/fluid/reader.py
index 6cc00a7fd3734..35dcd45223419 100644
--- a/python/paddle/fluid/reader.py
+++ b/python/paddle/fluid/reader.py
@@ -215,7 +215,7 @@ class DataLoader(object):
             None.
 
     Returns:
-        DataLoader: an iterable object for data iterating
+        DataLoader: an iterable object for data iterating, each elemnet of the generated data is a Tensor.
 
     Examples: