diff --git a/PackagingMallShipper/ViewModels/OrderListViewModel.cs b/PackagingMallShipper/ViewModels/OrderListViewModel.cs
index 9e5ebf8..fafb0b0 100644
--- a/PackagingMallShipper/ViewModels/OrderListViewModel.cs
+++ b/PackagingMallShipper/ViewModels/OrderListViewModel.cs
@@ -22,7 +22,11 @@ namespace PackagingMallShipper.ViewModels
         private readonly IExcelService _excelService;
 
         private DispatcherTimer _autoSyncTimer;
+        private DispatcherTimer _overdueCheckTimer;
+        private DateTime? _lastOverdueAlertTime;
         private const int AutoSyncIntervalMinutes = 30;
+        private const int OverdueHours = 48;  // 超时阈值（小时）
+        private const int OverdueAlertIntervalMinutes = 60;  // 超时提醒间隔（分钟）
 
         [ObservableProperty]
         private ObservableCollection<Order> _orders = new ObservableCollection<Order>();
@@ -82,6 +86,9 @@ namespace PackagingMallShipper.ViewModels
 
             // 初始化自动同步定时器
             InitializeAutoSyncTimer();
+
+            // 初始化超时检查定时器
+            InitializeOverdueCheckTimer();
         }
 
         private void InitializeAutoSyncTimer()
@@ -101,6 +108,16 @@ namespace PackagingMallShipper.ViewModels
             updateTimer.Start();
         }
 
+        private void InitializeOverdueCheckTimer()
+        {
+            // 每10分钟检查一次超时订单
+            _overdueCheckTimer = new DispatcherTimer
+            {
+                Interval = TimeSpan.FromMinutes(10)
+            };
+            _overdueCheckTimer.Tick += async (s, e) => await CheckOverdueOrdersAsync();
+        }
+
         public async Task InitializeAsync()
         {
             await RefreshOrdersAsync();
@@ -108,6 +125,11 @@ namespace PackagingMallShipper.ViewModels
 
             // 启动自动同步
             StartAutoSync();
+
+            // 启动超时检查（延迟5秒后开始，给界面加载时间）
+            _overdueCheckTimer?.Start();
+            await Task.Delay(5000);
+            await CheckOverdueOrdersAsync();
         }
 
         public void StartAutoSync()
@@ -320,6 +342,82 @@ namespace PackagingMallShipper.ViewModels
             public uint dwTimeout;
         }
 
+        private async Task CheckOverdueOrdersAsync()
+        {
+            try
+            {
+                // 检查是否需要提醒（距离上次提醒超过1小时）
+                if (_lastOverdueAlertTime.HasValue &&
+                    (DateTime.Now - _lastOverdueAlertTime.Value).TotalMinutes < OverdueAlertIntervalMinutes)
+                {
+                    return;
+                }
+
+                // 获取所有待发货订单
+                var pendingOrders = await _orderService.GetOrdersAsync(1, null);
+                var now = DateTime.Now;
+
+                // 筛选超过48小时未发货的订单（基于同步入库时间 SyncedAt）
+                var overdueOrders = pendingOrders
+                    .Where(o => o.SyncedAt.HasValue &&
+                                (now - o.SyncedAt.Value).TotalHours >= OverdueHours)
+                    .OrderBy(o => o.SyncedAt)
+                    .ToList();
+
+                if (overdueOrders.Any())
+                {
+                    _lastOverdueAlertTime = DateTime.Now;
+                    ShowOverdueOrdersAlert(overdueOrders);
+                }
+            }
+            catch (Exception ex)
+            {
+                System.Diagnostics.Debug.WriteLine($"检查超时订单失败: {ex.Message}");
+            }
+        }
+
+        private void ShowOverdueOrdersAlert(System.Collections.Generic.List<Order> overdueOrders)
+        {
+            Application.Current.Dispatcher.Invoke(() =>
+            {
+                // 播放警告提示音
+                System.Media.SystemSounds.Hand.Play();
+
+                // 构建提醒消息
+                var message = $"⚠️ 发现 {overdueOrders.Count} 个订单超过 {OverdueHours} 小时未发货！\n\n";
+
+                // 显示前5个超时订单的详情
+                var displayOrders = overdueOrders.Take(5).ToList();
+                foreach (var order in displayOrders)
+                {
+                    var hours = order.SyncedAt.HasValue
+                        ? (int)(DateTime.Now - order.SyncedAt.Value).TotalHours
+                        : 0;
+                    message += $"• {order.OrderNumber} - {order.LogisticsName} - 已等待 {hours} 小时\n";
+                }
+
+                if (overdueOrders.Count > 5)
+                {
+                    message += $"\n...还有 {overdueOrders.Count - 5} 个超时订单\n";
+                }
+
+                message += $"\n请尽快处理！\n（此提醒每小时弹出一次，直到所有订单发货）";
+
+                // 闪烁任务栏
+                var mainWindow = Application.Current.MainWindow;
+                if (mainWindow != null)
+                {
+                    FlashWindow(mainWindow);
+                }
+
+                // 显示警告对话框
+                MessageBox.Show(message, "⚠️ 订单超时提醒", MessageBoxButton.OK, MessageBoxImage.Warning);
+
+                // 更新状态栏
+                StatusMessage = $"⚠️ {overdueOrders.Count} 个订单超时未发货！";
+            });
+        }
+
         partial void OnAutoSyncEnabledChanged(bool value)
         {
             if (value)
@@ -560,6 +658,7 @@ namespace PackagingMallShipper.ViewModels
         public void Cleanup()
         {
             _autoSyncTimer?.Stop();
+            _overdueCheckTimer?.Stop();
         }
     }
 }