diff --git a/lib/ui/setup_wizard.dart b/lib/ui/setup_wizard.dart
index b2cac5b..42f19e2 100644
--- a/lib/ui/setup_wizard.dart
+++ b/lib/ui/setup_wizard.dart
@@ -1,3 +1,4 @@
+import 'dart:async';
 import 'dart:io';
 
 import 'package:flutter/material.dart';
@@ -53,17 +54,32 @@ class _SetupWizardState extends State<SetupWizard> {
   void initState() {
     super.initState();
     _checkPrinter();
+    // 第 2 步期间自动轮询：用户手动装驱动 / 插上打印机后页面自动刷新
+    // （驱动目录判断零成本；getStatus 走 lpoptions，3s 一次可接受）
+    _pollTimer = Timer.periodic(const Duration(seconds: 3), (_) {
+      if (_step == 1 && mounted && !_driverInstalling) {
+        _checkPrinter(silent: true);
+      }
+    });
   }
 
-  Future<void> _checkPrinter() async {
-    setState(() => _printerChecking = true);
+  Timer? _pollTimer;
+
+  @override
+  void dispose() {
+    _pollTimer?.cancel();
+    super.dispose();
+  }
+
+  Future<void> _checkPrinter({bool silent = false}) async {
+    if (!silent) setState(() => _printerChecking = true);
     try {
       final status = await _agent.backend.getStatus();
       if (mounted) setState(() => _printerStatus = status);
     } catch (_) {
       if (mounted) setState(() => _printerStatus = null);
     } finally {
-      if (mounted) setState(() => _printerChecking = false);
+      if (mounted && !silent) setState(() => _printerChecking = false);
     }
   }
 
@@ -262,9 +278,15 @@ class _SetupWizardState extends State<SetupWizard> {
             ),
           const SizedBox(height: 8),
           Text(
-            '安装完成后：USB 连接打印机并开机，系统识别出现打印队列即完成。',
+            '安装完成后页面会自动刷新（也可手动重新检测）；随后 USB 连接打印机并开机，系统识别出现打印队列即完成。',
             style: Theme.of(context).textTheme.bodySmall,
           ),
+          const SizedBox(height: 4),
+          TextButton.icon(
+            onPressed: _printerChecking ? null : () => _checkPrinter(),
+            icon: const Icon(Icons.refresh, size: 16),
+            label: const Text('重新检测'),
+          ),
         ]
 
         // 驱动已装但打印机未就绪 → 引导连接/添加队列