diff --git a/doc/fluid/howto/cluster/fluid_cluster_train_cn.md b/doc/fluid/howto/cluster/fluid_cluster_train_cn.md
index 2bf9584d81ffa9aa020897d06cbaf7468cdc1529..53ead763241e8d69d30d55f886874598799daf97 100644
--- a/doc/fluid/howto/cluster/fluid_cluster_train_cn.md
+++ b/doc/fluid/howto/cluster/fluid_cluster_train_cn.md
@@ -124,6 +124,7 @@ if training_role == "PSERVER":
 
 ### Demo
 完整的demo代码位于Fluid的test目录下的[book](https://github.com/PaddlePaddle/Paddle/blob/develop/python/paddle/fluid/tests/book/test_fit_a_line.py)中。
+
 第一步，进入demo代码所在目录：
 ```bash
 cd /paddle/python/paddle/fluid/tests/book