diff --git a/Dockerfile b/Dockerfile
index be5e23d..d304154 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,19 +1,28 @@
 FROM docker.io/python:3.10.16-slim
 
-RUN apt-get update && apt-get install -y \
+# 使用国内源，解决 apt-get 下载失败/超时问题
+RUN sed -i 's/deb.debian.org/mirrors.tuna.tsinghua.edu.cn/g' /etc/apt/sources.list \
+ && sed -i 's/security.debian.org/mirrors.tuna.tsinghua.edu.cn/g' /etc/apt/sources.list
+
+# apt-get 安装构建依赖 + 重试机制（非常重要）
+RUN apt-get update \
+ && apt-get install -y --no-install-recommends \
     gcc g++ unixodbc unixodbc-dev default-libmysqlclient-dev \
-    && rm -rf /var/lib/apt/lists/*
+ || (sleep 3 && apt-get update && apt-get install -y --no-install-recommends \
+    gcc g++ unixodbc unixodbc-dev default-libmysqlclient-dev) \
+ && rm -rf /var/lib/apt/lists/*
 
 WORKDIR /app
 
 COPY requirements.txt .
 
+# pip 使用清华源，加快安装
 RUN pip install --no-cache-dir -r requirements.txt -i https://pypi.tuna.tsinghua.edu.cn/simple
 
 COPY . .
 
-# 预置配置文件到宿主可挂载的位置，便于后续覆盖
+# 预置配置文件到宿主机可挂载位置
 RUN mkdir -p /opt/alert/model-lab \
-    && cp /app/config.py /opt/alert/model-lab/config.py
+ && cp /app/config.py /opt/alert/model-lab/config.py
 
 CMD ["python", "app.py"]