diff --git a/setup_cups.sh b/setup_cups.sh
index 59cf2ff..fbdd749 100755
--- a/setup_cups.sh
+++ b/setup_cups.sh
@@ -28,6 +28,59 @@ check_root() {
     fi
 }
 
+# 解决 apt 锁问题（停止自动更新服务）
+fix_apt_lock() {
+    info "检查 apt 锁状态..."
+
+    # 检查是否有 unattended-upgrades 进程
+    if pgrep -x "unattended-upgr" > /dev/null 2>&1; then
+        warn "检测到自动更新服务正在运行，正在停止..."
+
+        # 停止 unattended-upgrades 服务
+        systemctl stop unattended-upgrades 2>/dev/null || true
+
+        # 等待进程结束（最多等待30秒）
+        local count=0
+        while pgrep -x "unattended-upgr" > /dev/null 2>&1 && [ $count -lt 30 ]; do
+            sleep 1
+            ((count++))
+            echo -ne "\r  等待自动更新进程结束... ${count}s"
+        done
+        echo ""
+
+        # 如果还在运行，强制结束
+        if pgrep -x "unattended-upgr" > /dev/null 2>&1; then
+            warn "强制结束自动更新进程..."
+            killall unattended-upgr 2>/dev/null || true
+            sleep 2
+        fi
+
+        success "自动更新服务已停止"
+    fi
+
+    # 检查是否有其他 apt 进程
+    if fuser /var/lib/dpkg/lock-frontend > /dev/null 2>&1; then
+        warn "检测到其他 apt 进程，等待其完成..."
+        local count=0
+        while fuser /var/lib/dpkg/lock-frontend > /dev/null 2>&1 && [ $count -lt 60 ]; do
+            sleep 1
+            ((count++))
+            echo -ne "\r  等待 apt 锁释放... ${count}s"
+        done
+        echo ""
+    fi
+
+    # 清理可能残留的锁文件
+    rm -f /var/lib/dpkg/lock-frontend 2>/dev/null || true
+    rm -f /var/lib/dpkg/lock 2>/dev/null || true
+    rm -f /var/cache/apt/archives/lock 2>/dev/null || true
+
+    # 修复可能中断的安装
+    dpkg --configure -a 2>/dev/null || true
+
+    success "apt 锁检查完成"
+}
+
 # 检测系统版本和架构
 detect_os() {
     if [ -f /etc/os-release ]; then
@@ -782,6 +835,9 @@ main() {
     info "开始安装..."
     echo ""
 
+    # 0. 解决 apt 锁问题
+    fix_apt_lock
+
     # 1. 换源（如果选择）
     if [[ "$change_mirror" =~ ^[Yy]$ ]]; then
         change_to_china_mirror