diff --git a/doc/fluid/api_cn/nn_cn/functional_cn/one_hot_cn.rst b/doc/fluid/api_cn/nn_cn/functional_cn/one_hot_cn.rst
index be8e99caf95516b275c5cfbcb14d8491a4a84d22..1e9b65ab332fa9dda4e321d87baf8cc90b76e261 100644
--- a/doc/fluid/api_cn/nn_cn/functional_cn/one_hot_cn.rst
+++ b/doc/fluid/api_cn/nn_cn/functional_cn/one_hot_cn.rst
@@ -3,7 +3,7 @@
 one_hot
 -------------------------------
 
-.. py:function:: paddle.fluid.one_hot(x, num_classes)
+.. py:function:: paddle.fluid.nn.functional.one_hot(x, num_classes, name=None)
 
 :alias_main: paddle.nn.functional.one_hot
 :alias: paddle.nn.functional.one_hot,paddle.nn.functional.common.one_hot