diff --git a/doc/train.md b/doc/train.md
index a448aaa024f8dc621cf1597f2f57b4ed446ddce4..f54f80ae701fd71d4898c47147fdd073ad82998a 100644
--- a/doc/train.md
+++ b/doc/train.md
@@ -82,7 +82,7 @@ runner:
   epochs: 10 # 训练轮数
 
   save_checkpoint_interval: 2 # 每隔2轮保存一次checkpoint
-  save_inference_interval: 4 # 每个4轮保存依次inference model
+  save_inference_interval: 4 # 每隔4轮保存一次inference model
   save_checkpoint_path: "increment" # checkpoint 的保存地址
   save_inference_path: "inference" # inference model 的保存地址
   save_inference_feed_varnames: [] # inference model 的feed参数的名字