diff --git a/Jenkinsfile b/Jenkinsfile
index cd55193..fff386c 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -99,10 +99,10 @@ pipeline {
                         ssh -i ${SSH_KEY_PATH} -o StrictHostKeyChecking=no ${HOST_USER}@${HOST_IP} "mkdir -p ${HOST_BACKUP}"
                         
                         # 4. 宿主机备份原有部署目录（如有）
+                        TIMESTAMP=$(date +%Y%m%d%H%M%S)
                         ssh -i ${SSH_KEY_PATH} -o StrictHostKeyChecking=no ${HOST_USER}@${HOST_IP} "
                             if [ -d '${HOST_TARGET}' ]; then
-                                TIMESTAMP=$(date +%Y%m%d%H%M%S)
-                                mv ${HOST_TARGET} ${HOST_BACKUP}/backup${TIMESTAMP}
+                                mv ${HOST_TARGET} ${HOST_BACKUP}/backup_${TIMESTAMP}
                             fi
                         "