diff --git a/infra/docker/ci.Dockerfile b/infra/docker/ci.Dockerfile
index 873cd7224..0b2b21fd9 100644
--- a/infra/docker/ci.Dockerfile
+++ b/infra/docker/ci.Dockerfile
@@ -9,11 +9,9 @@ ENV PIP_DISABLE_PIP_VERSION_CHECK=1 \
 
 WORKDIR /workspace
 
-# 系统依赖：
-# - curl: CI checkout步骤下载代码archive
-# - libpq-dev: psycopg2-binary编译需要
-# - nodejs npm: 前端构建和测试
-RUN apt-get update \
+# 换阿里云apt源（加速Debian包下载）+ 安装系统依赖
+RUN sed -i 's|deb.debian.org|mirrors.aliyun.com|g' /etc/apt/sources.list.d/debian.sources \
+    && apt-get update \
     && apt-get install -y --no-install-recommends \
         curl \
         libpq-dev \