diff --git a/XP.ImageProcessing.RoiControl/Controls/PolygonRoiCanvas.xaml.cs b/XP.ImageProcessing.RoiControl/Controls/PolygonRoiCanvas.xaml.cs
index 1ddedc0..d1cd13a 100644
--- a/XP.ImageProcessing.RoiControl/Controls/PolygonRoiCanvas.xaml.cs
+++ b/XP.ImageProcessing.RoiControl/Controls/PolygonRoiCanvas.xaml.cs
@@ -176,6 +176,20 @@ namespace XP.ImageProcessing.RoiControl.Controls
             control.UpdateAdorner();
         }
 
+        /// <summary>
+        /// 是否允许滚轮缩放（默认允许）。
+        /// 实时图像显示过程中可设为 false 以禁用滚轮缩放。
+        /// </summary>
+        public static readonly DependencyProperty IsWheelZoomEnabledProperty =
+            DependencyProperty.Register(nameof(IsWheelZoomEnabled), typeof(bool), typeof(PolygonRoiCanvas),
+                new PropertyMetadata(true));
+
+        public bool IsWheelZoomEnabled
+        {
+            get => (bool)GetValue(IsWheelZoomEnabledProperty);
+            set => SetValue(IsWheelZoomEnabledProperty, value);
+        }
+
         public static readonly DependencyProperty PanOffsetXProperty =
             DependencyProperty.Register(nameof(PanOffsetX), typeof(double), typeof(PolygonRoiCanvas),
                 new PropertyMetadata(0.0, OnPanOffsetChanged));
@@ -2209,6 +2223,13 @@ namespace XP.ImageProcessing.RoiControl.Controls
 
         private void Canvas_MouseWheel(object sender, MouseWheelEventArgs e)
         {
+            // 实时显示过程中禁用滚轮缩放
+            if (!IsWheelZoomEnabled)
+            {
+                e.Handled = true;
+                return;
+            }
+
             double oldZoom = ZoomScale;
             double newZoom = e.Delta > 0 ? oldZoom * ZoomStep : oldZoom / ZoomStep;
             newZoom = Math.Max(0.1, Math.Min(10.0, newZoom));
diff --git a/XplorePlane/ViewModels/Main/ViewportPanelViewModel.cs b/XplorePlane/ViewModels/Main/ViewportPanelViewModel.cs
index 44ef8da..744e02a 100644
--- a/XplorePlane/ViewModels/Main/ViewportPanelViewModel.cs
+++ b/XplorePlane/ViewModels/Main/ViewportPanelViewModel.cs
@@ -94,10 +94,18 @@ namespace XplorePlane.ViewModels
             set
             {
                 if (SetProperty(ref _isRealtimeEnabled, value))
+                {
                     _mainViewportService.SetRealtimeDisplayEnabled(value);
+                    RaisePropertyChanged(nameof(IsWheelZoomEnabled));
+                }
             }
         }
 
+        /// <summary>
+        /// 是否允许滚轮缩放：实时显示过程中禁用，停止实时后可缩放。
+        /// </summary>
+        public bool IsWheelZoomEnabled => !_isRealtimeEnabled;
+
         // Task 5.3: IsDetectorConnected property (read-only, private setter)
         public bool IsDetectorConnected
         {
@@ -227,6 +235,7 @@ namespace XplorePlane.ViewModels
             // Task 5.8: Sync IsRealtimeEnabled from service
             _isRealtimeEnabled = _mainViewportService.IsRealtimeDisplayEnabled;
             RaisePropertyChanged(nameof(IsRealtimeEnabled));
+            RaisePropertyChanged(nameof(IsWheelZoomEnabled));
 
             // Task 5.8: Sync _isCncRunning from service and raise IsAnimatedSwitchEnabled
             _isCncRunning = _mainViewportService.IsCncRunning;
diff --git a/XplorePlane/Views/Main/ViewportPanelView.xaml b/XplorePlane/Views/Main/ViewportPanelView.xaml
index 95ca774..dea579a 100644
--- a/XplorePlane/Views/Main/ViewportPanelView.xaml
+++ b/XplorePlane/Views/Main/ViewportPanelView.xaml
@@ -35,6 +35,7 @@
                 x:Name="RoiCanvas"
                 Background="White"
                 ImageSource="{Binding ImageSource}"
+                IsWheelZoomEnabled="{Binding IsWheelZoomEnabled}"
                 ScaleBarMmPerPixel="0.139"
                 ShowScaleBar="{Binding DataContext.IsScaleBarVisible, RelativeSource={RelativeSource AncestorType=Window}}" />
         </Grid>