diff --git a/.drone.yml b/.drone.yml
index cb4edd7..d736b15 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -10,12 +10,10 @@ steps:
       - name: docker-socket
         path: /var/run/docker.sock
     commands:
+      - export APP_NAME="node-app"
+      - export CONTAINER_NAME="node-app-prod"
+      - export CURRENT_TAG=$(echo ${DRONE_COMMIT_SHA} | cut -c1-8)
       - |
-        # 定义应用相关的名称标识
-        APP_NAME="node-app"
-        CONTAINER_NAME="node-app-prod"
-        CURRENT_TAG="${DRONE_COMMIT_SHA:0:8}"
-
         # 调试输出变量值，确认变量是否正确设置
         echo "调试信息: APP_NAME=${APP_NAME}, CONTAINER_NAME=${CONTAINER_NAME}, CURRENT_TAG=${CURRENT_TAG}"
         
@@ -33,13 +31,17 @@ steps:
         
         # 2. 删除同前缀的旧镜像（排除当前构建标签）
         echo "清理旧镜像..."
-        docker images --filter "reference=${APP_NAME}:*" --format "{{.ID}} {{.Tag}}" | \
-        while read -r image_id tag; do
-          if [ "$tag" != "$CURRENT_TAG" ] && [ "$tag" != "<none>" ]; then
-            echo "删除旧镜像: ${APP_NAME}:${tag} (ID: ${image_id})"
-            docker rmi -f ${image_id} || true
-          fi
-        done
+        if [ -n "${APP_NAME}" ] && [ -n "${CURRENT_TAG}" ]; then
+          docker images --filter "reference=${APP_NAME}:*" --format "{{.ID}} {{.Tag}}" | \
+          while read -r image_id tag; do
+            if [ "$tag" != "$CURRENT_TAG" ] && [ "$tag" != "<none>" ]; then
+              echo "删除旧镜像: ${APP_NAME}:${tag} (ID: ${image_id})"
+              docker rmi -f ${image_id} || true
+            fi
+          done
+        else
+          echo "APP_NAME或CURRENT_TAG未设置，跳过镜像清理"
+        fi
         
         # 3. 清理悬空镜像（构建失败产生的none标签镜像）
         echo "清理悬空镜像..."
@@ -50,6 +52,7 @@ steps:
           echo "没有悬空镜像需要清理"
         fi
 
+
   # 第一步：准备环境并安装依赖
   - name: install-dependencies
     image: node:18-bullseye