diff --git a/python/paddle/utils/plot.py b/python/paddle/utils/plot.py
index bd6cef1ef2743fb0b4a70fee9324e64cc53d4ea2..172436a1312579150f4e17bdf9227e67080fb1ab 100644
--- a/python/paddle/utils/plot.py
+++ b/python/paddle/utils/plot.py
@@ -36,7 +36,7 @@ class Ploter(object):
         Args:
             title: assign the title of input data.
             step: x_axis of the data.
-            value: y_axis of the data
+            value: y_axis of the data.
     """
 
     def __init__(self, *args):