diff --git a/README.md b/README.md
index 08211a4..2f9de4e 100644
--- a/README.md
+++ b/README.md
@@ -307,4 +307,6 @@ docker stop ulthon_admin
 docker remove ulthon_admin
 # 开启交互终端
 docker exec -it ulthon_admin /bin/bash
+# 删除没有运行的镜像
+docker image prune -a
 ```
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