diff --git a/backend/Dockerfile b/backend/Dockerfile
index 2d04a21..ff299f8 100644
--- a/backend/Dockerfile
+++ b/backend/Dockerfile
@@ -3,6 +3,9 @@ FROM maven:3.8.6-openjdk-8 AS builder
 
 WORKDIR /app
 
+# 配置阿里云 Maven 镜像（容器内加速依赖下载，避免直连境外中央仓库 SSL 失败）
+COPY settings.xml /root/.m2/settings.xml
+
 # 复制 pom.xml 并下载依赖（利用 Docker 缓存）
 COPY pom.xml .
 RUN mvn dependency:go-offline
diff --git a/backend/settings.xml b/backend/settings.xml
new file mode 100644
index 0000000..21671ae
--- /dev/null
+++ b/backend/settings.xml
@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  专供 Docker 构建容器内 Maven 使用：将所有仓库请求镜像到阿里云，
+  避免直连境外 Maven 中央仓库（repo.maven.apache.org）出现 SSL 握手失败 / 超时。
+-->
+<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"
+          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+          xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0 https://maven.apache.org/xsd/settings-1.0.0.xsd">
+  <mirrors>
+    <mirror>
+      <id>aliyun-public</id>
+      <mirrorOf>*</mirrorOf>
+      <name>Aliyun Public Repository</name>
+      <url>https://maven.aliyun.com/repository/public</url>
+    </mirror>
+  </mirrors>
+</settings>