diff --git a/install.sh b/install.sh
index 2987b74..f15dfcf 100755
--- a/install.sh
+++ b/install.sh
@@ -8,6 +8,30 @@
 
 set -e
 
+# 错误处理函数
+error_handler() {
+    local line_number=$1
+    local command=$2
+    echo ""
+    echo -e "${RED}========================================${NC}"
+    echo -e "${RED}  脚本执行出错！${NC}"
+    echo -e "${RED}========================================${NC}"
+    echo -e "${YELLOW}错误位置: 第 ${line_number} 行${NC}"
+    echo -e "${YELLOW}失败命令: ${command}${NC}"
+    echo ""
+    echo -e "${YELLOW}故障排查建议:${NC}"
+    echo "  1. 检查网络连接是否正常"
+    echo "  2. 检查后端地址是否正确: ${BACKEND_URL:-未设置}"
+    echo "  3. 检查是否有足够的磁盘空间和权限"
+    echo "  4. 查看上面的详细错误信息"
+    echo ""
+    echo -e "${YELLOW}查看服务日志: sudo journalctl -u ${SERVICE_NAME:-linkmaster-node} -n 50${NC}"
+    exit 1
+}
+
+# 设置错误陷阱
+trap 'error_handler ${LINENO} "${BASH_COMMAND}"' ERR
+
 # 颜色输出
 RED='\033[0;31m'
 GREEN='\033[0;32m'
@@ -1262,11 +1286,18 @@ EOF
     
     # 调用心跳API获取节点信息
     echo -e "${BLUE}发送心跳请求获取节点信息...${NC}"
-    RESPONSE=$(curl -s -X POST "${BACKEND_URL}/api/node/heartbeat" \
+    echo -e "${BLUE}后端地址: ${BACKEND_URL}${NC}"
+    
+    # 添加超时设置，避免长时间卡住
+    # 使用 set +e 临时禁用错误退出，因为心跳失败不应该阻止安装
+    set +e
+    RESPONSE=$(curl -s --connect-timeout 10 --max-time 30 -X POST "${BACKEND_URL}/api/node/heartbeat" \
         -H "Content-Type: application/x-www-form-urlencoded" \
         -d "type=pingServer" 2>&1)
+    CURL_EXIT_CODE=$?
+    set -e  # 重新启用错误退出
     
-    if [ $? -eq 0 ]; then
+    if [ $CURL_EXIT_CODE -eq 0 ]; then
         # 尝试解析JSON响应
         NODE_ID=$(echo "$RESPONSE" | grep -o '"node_id":[0-9]*' | grep -o '[0-9]*' | head -1)
         NODE_IP=$(echo "$RESPONSE" | grep -o '"node_ip":"[^"]*"' | cut -d'"' -f4 | head -1)
@@ -1304,8 +1335,10 @@ EOF
             echo -e "${YELLOW}  响应: ${RESPONSE}${NC}"
         fi
     else
-        echo -e "${YELLOW}⚠ 心跳请求失败，将在服务启动时重试${NC}"
-        echo -e "${YELLOW}  错误: ${RESPONSE}${NC}"
+        echo -e "${YELLOW}⚠ 心跳请求失败 (退出码: ${CURL_EXIT_CODE})，将在服务启动时重试${NC}"
+        echo -e "${YELLOW}  错误信息: ${RESPONSE}${NC}"
+        echo -e "${YELLOW}  提示: 请检查后端地址是否正确: ${BACKEND_URL}${NC}"
+        echo -e "${YELLOW}  测试连接: curl -v ${BACKEND_URL}/api/public/nodes/online${NC}"
     fi
     
     # 设置配置文件权限
@@ -1316,18 +1349,52 @@ EOF
 start_service() {
     echo -e "${BLUE}启动服务...${NC}"
     
-    sudo systemctl enable ${SERVICE_NAME} > /dev/null 2>&1
-    sudo systemctl restart ${SERVICE_NAME}
+    # 先检查服务文件是否存在
+    if [ ! -f "/etc/systemd/system/${SERVICE_NAME}.service" ]; then
+        echo -e "${RED}✗ 错误: 服务文件不存在${NC}"
+        echo -e "${YELLOW}  路径: /etc/systemd/system/${SERVICE_NAME}.service${NC}"
+        exit 1
+    fi
+    
+    # 检查二进制文件是否存在
+    if [ ! -f "$SOURCE_DIR/agent" ] && [ ! -f "$INSTALL_DIR/$BINARY_NAME" ]; then
+        echo -e "${RED}✗ 错误: 二进制文件不存在${NC}"
+        echo -e "${YELLOW}  检查路径: $SOURCE_DIR/agent 或 $INSTALL_DIR/$BINARY_NAME${NC}"
+        exit 1
+    fi
+    
+    # 启用服务（显示输出以便调试）
+    echo -e "${BLUE}启用服务...${NC}"
+    if ! sudo systemctl enable ${SERVICE_NAME} 2>&1; then
+        echo -e "${RED}✗ 启用服务失败${NC}"
+        exit 1
+    fi
+    
+    # 重新加载 systemd
+    echo -e "${BLUE}重新加载 systemd...${NC}"
+    sudo systemctl daemon-reload
+    
+    # 启动服务（显示输出以便调试）
+    echo -e "${BLUE}启动服务...${NC}"
+    if ! sudo systemctl restart ${SERVICE_NAME} 2>&1; then
+        echo -e "${RED}✗ 启动服务失败${NC}"
+        echo -e "${YELLOW}查看详细日志: sudo journalctl -u ${SERVICE_NAME} -n 100 --no-pager${NC}"
+        echo -e "${YELLOW}查看服务状态: sudo systemctl status ${SERVICE_NAME}${NC}"
+        exit 1
+    fi
     
     # 等待服务启动
+    echo -e "${BLUE}等待服务启动...${NC}"
     sleep 3
     
     # 检查服务状态
-    if sudo systemctl is-active --quiet ${SERVICE_NAME}; then
+    if sudo systemctl is-active --quiet ${SERVICE_NAME} 2>/dev/null; then
         echo -e "${GREEN}✓ 服务启动成功${NC}"
     else
         echo -e "${RED}✗ 服务启动失败${NC}"
-        echo -e "${YELLOW}查看日志: sudo journalctl -u ${SERVICE_NAME} -n 50${NC}"
+        echo -e "${YELLOW}服务状态:${NC}"
+        sudo systemctl status ${SERVICE_NAME} --no-pager -l || true
+        echo -e "${YELLOW}查看详细日志: sudo journalctl -u ${SERVICE_NAME} -n 100 --no-pager${NC}"
         exit 1
     fi
 }
@@ -1385,20 +1452,29 @@ main() {
     echo -e "${GREEN}  LinkMaster 节点端安装程序${NC}"
     echo -e "${GREEN}========================================${NC}"
     echo ""
+    echo -e "${BLUE}后端地址: ${BACKEND_URL}${NC}"
+    echo ""
     
+    echo -e "${BLUE}[1/8] 检测系统类型...${NC}"
     detect_system
     
     # 检查是否已安装，如果已安装则先卸载
     if check_installed; then
+        echo -e "${BLUE}[2/8] 卸载已存在的服务...${NC}"
         uninstall_service
+    else
+        echo -e "${BLUE}[2/8] 检查已安装服务...${NC}"
+        echo -e "${GREEN}✓ 未检测到已安装的服务${NC}"
     fi
     
-    # 检测并配置最快的镜像源（在安装依赖之前）
+    echo -e "${BLUE}[3/8] 检测并配置镜像源...${NC}"
     detect_fastest_mirror
     
+    echo -e "${BLUE}[4/8] 安装系统依赖...${NC}"
     install_dependencies
     
     # 优先尝试从 Releases 下载二进制文件
+    echo -e "${BLUE}[5/8] 下载或编译二进制文件...${NC}"
     if ! download_binary_from_releases; then
         echo -e "${BLUE}从 Releases 下载失败，开始从源码编译...${NC}"
         build_from_source
@@ -1406,10 +1482,19 @@ main() {
         echo -e "${GREEN}✓ 使用预编译二进制文件，跳过编译步骤${NC}"
     fi
     
+    echo -e "${BLUE}[6/8] 创建 systemd 服务...${NC}"
     create_service
+    
+    echo -e "${BLUE}[7/8] 配置防火墙规则...${NC}"
     configure_firewall
+    
+    echo -e "${BLUE}[8/8] 登记节点到后端服务器...${NC}"
     register_node
+    
+    echo -e "${BLUE}[9/9] 启动服务...${NC}"
     start_service
+    
+    echo -e "${BLUE}[10/10] 验证安装...${NC}"
     verify_installation
     
     echo ""