diff --git a/README.md b/README.md
index 74bdf4fdc..fe80a285a 100644
--- a/README.md
+++ b/README.md
@@ -30,6 +30,7 @@ npm run pm2
 ```
 或者
 ```bash
+npm install pm2 -g //装过就不用再执行此条
 ./build.sh
 ```