diff --git a/MainModule/ViewModels/AutomatedTestingViewModel.cs b/MainModule/ViewModels/AutomatedTestingViewModel.cs
index 768be82..0b586a0 100644
--- a/MainModule/ViewModels/AutomatedTestingViewModel.cs
+++ b/MainModule/ViewModels/AutomatedTestingViewModel.cs
@@ -234,11 +234,23 @@ namespace MainModule.ViewModels
         #region 命令处理与事件
         private async Task OnLoad()
         {
-            if (!IsInitialized)
+            // 设备初始化期间仅对当前台架显示灰度遮罩层，初始化完成后关闭（finally 保证异常时也能关闭）
+            _eventAggregator.GetEvent<ScopeOverlayEvent>().Publish(new ScopeOverlayArgs { Scope = TestStatus, Show = true });
+            // 让遮罩层先完成渲染，再进入同步阻塞的设备初始化（泵送 Dispatcher 至 Render 优先级）
+            System.Windows.Application.Current?.Dispatcher.Invoke(() => { }, System.Windows.Threading.DispatcherPriority.Render);
+            try
             {
-                await _deviceManager.ConnectAllDevices();
-                IsInitialized = true;
+                if (!IsInitialized)
+                {
+                    await _deviceManager.ConnectAllDevices();
+                    IsInitialized = true;
+                }
             }
+            finally
+            {
+                _eventAggregator.GetEvent<ScopeOverlayEvent>().Publish(new ScopeOverlayArgs { Scope = TestStatus, Show = false });
+            }
+            
         }
 
         private void OnRefresh()
diff --git a/MainModule/Views/AutomatedTestingView.xaml b/MainModule/Views/AutomatedTestingView.xaml
index 2ec97a5..470a558 100644
--- a/MainModule/Views/AutomatedTestingView.xaml
+++ b/MainModule/Views/AutomatedTestingView.xaml
@@ -128,6 +128,26 @@
                 </vs:ParametersManager.Style>
             </vs:ParametersManager>
 
+            <Border x:Name="Overlay"
+        Background="#40000000"
+        Visibility="Collapsed"
+        Panel.ZIndex="1"
+        Grid.RowSpan="2"
+        Grid.ColumnSpan="4">
+                <StackPanel Width="150"
+                VerticalAlignment="Center"
+                Margin="0 0 0 100">
+                    <ProgressBar Width="80"
+                     Height="80"
+                     Margin="20"
+                     IsIndeterminate="True"
+                     Style="{StaticResource MaterialDesignCircularProgressBar}" />
+                    <TextBlock FontSize="30"
+                   Text="加载中......"
+                   HorizontalAlignment="Center" />
+                </StackPanel>
+            </Border>
         </Grid>
+
     </Border>
 </UserControl>
\ No newline at end of file
diff --git a/MainModule/Views/AutomatedTestingView.xaml.cs b/MainModule/Views/AutomatedTestingView.xaml.cs
index 3d56642..cc8ecec 100644
--- a/MainModule/Views/AutomatedTestingView.xaml.cs
+++ b/MainModule/Views/AutomatedTestingView.xaml.cs
@@ -1,4 +1,6 @@
-using System;
+using Prism.Events;
+using MainModule.ViewModels;
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
@@ -12,6 +14,7 @@ using System.Windows.Media;
 using System.Windows.Media.Imaging;
 using System.Windows.Navigation;
 using System.Windows.Shapes;
+using UIShare.PubEvent;
 
 namespace MainModule.Views
 {
@@ -20,9 +23,23 @@ namespace MainModule.Views
     /// </summary>
     public partial class AutomatedTestingView : UserControl
     {
-        public AutomatedTestingView()
+        public AutomatedTestingView(IEventAggregator eventAggregator)
         {
             InitializeComponent();
+            eventAggregator.GetEvent<OverlayEvent>().Subscribe(ShowOverlay);
+            // 台架级加载遮罩：仅台架名称匹配时响应，避免其他台架/主窗口同时变灰
+            eventAggregator.GetEvent<ScopeOverlayEvent>().Subscribe(ShowScopeOverlay);
+        }
+        private void ShowOverlay(bool arg)
+        {
+            Overlay.Visibility = arg ? Visibility.Visible : Visibility.Collapsed;
+        }
+
+        private void ShowScopeOverlay(ScopeOverlayArgs args)
+        {
+            // 只处理属于当前台架的遮罩事件（TestStatus 在 OnNavigatedTo 时赋值）
+            if (DataContext is not AutomatedTestingViewModel vm || vm.TestStatus != args.Scope) return;
+            Overlay.Visibility = args.Show ? Visibility.Visible : Visibility.Collapsed;
         }
     }
 }
diff --git a/UIShare/PubEvent/OverlayEvent.cs b/UIShare/PubEvent/OverlayEvent.cs
index dd886db..e476263 100644
--- a/UIShare/PubEvent/OverlayEvent.cs
+++ b/UIShare/PubEvent/OverlayEvent.cs
@@ -9,4 +9,22 @@ namespace UIShare.PubEvent
     public class OverlayEvent : PubSubEvent<bool>
     {
     }
+
+    /// <summary>
+    /// 作用域感知的灰度遮罩事件：仅台架名称与 Scope 匹配的台架视图显示/隐藏加载遮罩，
+    /// 避免全局 OverlayEvent 导致所有台架及主窗口同时变灰。
+    /// </summary>
+    public class ScopeOverlayEvent : PubSubEvent<ScopeOverlayArgs>
+    {
+    }
+
+    /// <summary>作用域遮罩事件参数。</summary>
+    public class ScopeOverlayArgs
+    {
+        /// <summary>台架名称（与 SystemConfig.Title / TestStatus 一致）。</summary>
+        public string Scope { get; set; } = string.Empty;
+
+        /// <summary>true 显示遮罩，false 隐藏遮罩。</summary>
+        public bool Show { get; set; }
+    }
 }