diff --git a/XP.ImageProcessing.RoiControl/Controls/PolygonRoiCanvas.xaml.cs b/XP.ImageProcessing.RoiControl/Controls/PolygonRoiCanvas.xaml.cs
index 917ae39..2473333 100644
--- a/XP.ImageProcessing.RoiControl/Controls/PolygonRoiCanvas.xaml.cs
+++ b/XP.ImageProcessing.RoiControl/Controls/PolygonRoiCanvas.xaml.cs
@@ -1947,14 +1947,44 @@ namespace XP.ImageProcessing.RoiControl.Controls
             // BGA 模式下阻止 ContextMenu 弹出
             if (CurrentMeasureMode == Models.MeasureMode.BgaVoid && _bgaCurrent != null)
             {
+                SuppressContextMenu = true;
                 e.Handled = true;
             }
+            // 外部请求抑制右键菜单
+            if (SuppressContextMenu)
+            {
+                e.Handled = true;
+            }
+            // ROI 选中状态下，右键点击顶点附近时删除顶点并阻止菜单
+            if (SelectedROI is PolygonROI poly && poly.IsSelected && poly.IsEditable && poly.Points.Count > 3)
+            {
+                var pos = e.GetPosition(mainCanvas);
+                double threshold = 15;
+                int nearestIndex = -1;
+                double nearestDist = double.MaxValue;
+                for (int i = 0; i < poly.Points.Count; i++)
+                {
+                    var pt = poly.Points[i];
+                    double dx = pt.X - pos.X, dy = pt.Y - pos.Y;
+                    double dist = Math.Sqrt(dx * dx + dy * dy);
+                    if (dist < nearestDist) { nearestDist = dist; nearestIndex = i; }
+                }
+                if (nearestIndex >= 0 && nearestDist < threshold)
+                {
+                    poly.Points.RemoveAt(nearestIndex);
+                    SuppressContextMenu = true;
+                    e.Handled = true;
+                }
+            }
         }
 
+        /// <summary>设置为 true 可抑制下一次右键菜单弹出，由外部（如 ViewportPanelView）在 ContextMenuOpening 中检查</summary>
+        public bool SuppressContextMenu { get; set; }
+
         private void ROI_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
         {
-            // 选择ROI
-            if (sender is FrameworkElement element && element.DataContext is ROIShape roi)
+            // 选择ROI（仅可编辑时）
+            if (sender is FrameworkElement element && element.DataContext is ROIShape roi && roi.IsEditable)
             {
                 SelectedROI = roi;
                 e.Handled = true;
diff --git a/XP.ImageProcessing.RoiControl/Models/ROIShape.cs b/XP.ImageProcessing.RoiControl/Models/ROIShape.cs
index 0e5c7a8..ca87788 100644
--- a/XP.ImageProcessing.RoiControl/Models/ROIShape.cs
+++ b/XP.ImageProcessing.RoiControl/Models/ROIShape.cs
@@ -21,6 +21,7 @@ namespace XP.ImageProcessing.RoiControl.Models
     public abstract class ROIShape : INotifyPropertyChanged
     {
         private bool _isSelected;
+        private bool _isEditable = true;
         private string _id = Guid.NewGuid().ToString();
         private string _color = "Red";
 
@@ -36,6 +37,13 @@ namespace XP.ImageProcessing.RoiControl.Models
             set { _isSelected = value; OnPropertyChanged(); }
         }
 
+        /// <summary>是否可编辑（拖拽顶点、删除顶点）</summary>
+        public bool IsEditable
+        {
+            get => _isEditable;
+            set { _isEditable = value; OnPropertyChanged(); }
+        }
+
         public string Color
         {
             get => _color;