diff --git a/00base/08jenkins-agent-install-centos.sh b/00base/08jenkins-agent-install-centos.sh
index 4b6a978..e553240 100644
--- a/00base/08jenkins-agent-install-centos.sh
+++ b/00base/08jenkins-agent-install-centos.sh
@@ -405,7 +405,7 @@ Available Commands:
   init                初始化系统
 Flag:
   -base-dir           新增用户名, 默认: '/data/jenkins-agent/env'
-  -agent              jenkins-agent下载地址(${JENKINS_URL}/jnlpJars/agent.jar)， 默认: ''
+  -agent              jenkins-agent下载地址(\${JENKINS_URL}/jnlpJars/agent.jar)， 默认: ''
   -git                是否安装git, 默认: '1'
   -java               是否安装java(8, 11, 17), 默认: '1'
   -gradle             安装gradle版本(6.8.3 | 6.9.3 | 7.4.2 | 7.5.1), 默认: '6.8.3'