diff --git a/scripts/deploy_docker.sh b/scripts/deploy_docker.sh
index 3c998f9..e3b1cd1 100644
--- a/scripts/deploy_docker.sh
+++ b/scripts/deploy_docker.sh
@@ -24,7 +24,12 @@ fi
 if [ -z "$ENV_FILE" ]; then
   echo "未使用 env 文件，配置仅通过 server/config.$ENV_NAME.yaml 加载" >&2
 fi
-docker build -t "$IMAGE:$TAG" -f Dockerfile .
+if docker image inspect "$IMAGE:$TAG" >/dev/null 2>&1; then
+  echo "使用已有镜像: $IMAGE:$TAG"
+else
+  echo "镜像不存在，开始构建: $IMAGE:$TAG"
+  docker build -t "$IMAGE:$TAG" -f Dockerfile .
+fi
 mkdir -p log storage/export
 CID_NAME="marketing-data-$ENV_NAME"
 RUNNING=$(docker inspect -f '{{.State.Running}}' "$CID_NAME" 2>/dev/null || echo false)