diff --git a/fastNLP/core/callback.py b/fastNLP/core/callback.py
index 9830ff1e0ec03180195e6e1b4e86488539d82e35..11f9986d5587bf8c155915d874601859bd294bb6 100644
--- a/fastNLP/core/callback.py
+++ b/fastNLP/core/callback.py
@@ -300,7 +300,7 @@ class Callback(object):
 
 
 def _transfer(func):
-    r"""装饰器，将对CallbackManager的调用转发到各个Callback子类.
+    r"""装饰器，将对CallbackManager的调用转发到各个Callback实例.
     
     :param func:
     :return: