diff --git a/deploy/install.sh b/deploy/install.sh
index 36816bf..0309f9d 100644
--- a/deploy/install.sh
+++ b/deploy/install.sh
@@ -171,6 +171,18 @@ setup_gateway() {
   npm ci
 }
 
+setup_pm2_startup() {
+  log_info "配置 PM2 开机自启…"
+  local startup_cmd
+  startup_cmd=$(pm2 startup systemd -u root --hp /root 2>&1 | grep -E '^sudo ' | tail -1 || true)
+  if [[ -n "${startup_cmd}" ]]; then
+    # shellcheck disable=SC2086
+    eval ${startup_cmd} || log_warn "PM2 开机自启配置失败，可稍后手动执行: pm2 startup"
+  else
+    log_warn "未获取 PM2 startup 命令，重启后需手动 pm2 resurrect"
+  fi
+}
+
 start_pm2() {
   log_info "启动 PM2 服务…"
   cd "${INSTALL_DIR}"
@@ -178,10 +190,7 @@ start_pm2() {
   pm2 delete grade-api grade-web 2>/dev/null || true
   pm2 start deploy/pm2/ecosystem.config.cjs
   pm2 save
-  env PATH="$PATH" pm2 startup systemd -u root --hp /root >/tmp/pm2-startup.sh 2>/dev/null || true
-  if [[ -f /tmp/pm2-startup.sh ]]; then
-    bash /tmp/pm2-startup.sh || true
-  fi
+  setup_pm2_startup
 }
 
 wait_healthy() {