diff --git a/source/user_guides/howto/training/dist_train_howto.md b/source/user_guides/howto/training/dist_train_howto.md
index 799d315de702fe36153d8a6e3e6af9a844f73cbf..5a42c2293219b840865583503c626dd29f04abea 100644
--- a/source/user_guides/howto/training/dist_train_howto.md
+++ b/source/user_guides/howto/training/dist_train_howto.md
@@ -24,9 +24,9 @@
 | Performance | Faster | Fast |
 
 * RPC通信方式的结构：
-  <img src="src/dist_train_pserver.png">
+  <img src="src/dist_train_pserver.png" width="500">
 * NCCL2通信方式的结构：
-  <img src="src/dist_train_nccl2.png">
+  <img src="src/dist_train_nccl2.png" width="500">
 
 
 ## 使用parameter server方式的训练