diff --git a/XP.ImageProcessing.RoiControl/Controls/PolygonRoiCanvas.xaml.cs b/XP.ImageProcessing.RoiControl/Controls/PolygonRoiCanvas.xaml.cs
index d4e9b53..e6a3d9f 100644
--- a/XP.ImageProcessing.RoiControl/Controls/PolygonRoiCanvas.xaml.cs
+++ b/XP.ImageProcessing.RoiControl/Controls/PolygonRoiCanvas.xaml.cs
@@ -578,11 +578,87 @@ namespace XP.ImageProcessing.RoiControl.Controls
             var g = new Models.MeasureGroup { P1 = p1, P2 = p2 };
             g.Line = new Line { Stroke = Brushes.Lime, StrokeThickness = 1, IsHitTestVisible = false };
             g.Label = new TextBlock { Foreground = Brushes.Yellow, FontSize = 13, FontWeight = FontWeights.Bold, IsHitTestVisible = false };
+            
+            // 使用垂直线段代替圆点
+            g.PerpLine1 = new Line { Stroke = Brushes.Yellow, StrokeThickness = 1, IsHitTestVisible = true, Cursor = Cursors.Hand };
+            g.PerpLine2 = new Line { Stroke = Brushes.Yellow, StrokeThickness = 1, IsHitTestVisible = true, Cursor = Cursors.Hand };
+            
+            // 保留圆点以兼容拖拽逻辑（但设为不可见）
             g.Dot1 = CreateMDot(Brushes.Red);
             g.Dot2 = CreateMDot(Brushes.Blue);
-            foreach (UIElement el in new UIElement[] { g.Line, g.Label, g.Dot1, g.Dot2 })
+            g.Dot1.Visibility = Visibility.Collapsed;
+            g.Dot2.Visibility = Visibility.Collapsed;
+            
+            foreach (UIElement el in new UIElement[] { g.Line, g.Label, g.PerpLine1, g.PerpLine2, g.Dot1, g.Dot2 })
                 _measureOverlay.Children.Add(el);
+            
+            // 设置圆点位置（用于拖拽计算）
             SetDotPos(g.Dot1, p1); SetDotPos(g.Dot2, p2);
+            
+            // 垂直线段1的拖拽处理 - 直接设置拖拽状态
+            g.PerpLine1.MouseLeftButtonDown += (s, e) =>
+            {
+                _mDraggingOwner = g;
+                _mDraggingRole = "Dot1";
+                _mDraggingDot = g.Dot1;
+                g.PerpLine1.CaptureMouse();
+                e.Handled = true;
+            };
+            g.PerpLine1.MouseMove += (s, e) =>
+            {
+                if (_mDraggingOwner != g || _mDraggingRole != "Dot1" || _measureOverlay == null) return;
+                if (e.LeftButton != MouseButtonState.Pressed) return;
+                var pos = e.GetPosition(_measureOverlay);
+                SetDotPos(g.Dot1, pos);
+                g.P1 = pos;
+                g.UpdateLine();
+                g.UpdateLabel(FormatDistance(g.Distance));
+                RaiseMeasureCompleted(g.P1, g.P2, g.Distance, MeasureCount, "PointDistance");
+            };
+            g.PerpLine1.MouseLeftButtonUp += (s, e) =>
+            {
+                if (_mDraggingOwner == g && _mDraggingRole == "Dot1")
+                {
+                    _mDraggingOwner = null;
+                    _mDraggingRole = null;
+                    _mDraggingDot = null;
+                    g.PerpLine1.ReleaseMouseCapture();
+                }
+                e.Handled = true;
+            };
+            
+            // 垂直线段2的拖拽处理
+            g.PerpLine2.MouseLeftButtonDown += (s, e) =>
+            {
+                _mDraggingOwner = g;
+                _mDraggingRole = "Dot2";
+                _mDraggingDot = g.Dot2;
+                g.PerpLine2.CaptureMouse();
+                e.Handled = true;
+            };
+            g.PerpLine2.MouseMove += (s, e) =>
+            {
+                if (_mDraggingOwner != g || _mDraggingRole != "Dot2" || _measureOverlay == null) return;
+                if (e.LeftButton != MouseButtonState.Pressed) return;
+                var pos = e.GetPosition(_measureOverlay);
+                SetDotPos(g.Dot2, pos);
+                g.P2 = pos;
+                g.UpdateLine();
+                g.UpdateLabel(FormatDistance(g.Distance));
+                RaiseMeasureCompleted(g.P1, g.P2, g.Distance, MeasureCount, "PointDistance");
+            };
+            g.PerpLine2.MouseLeftButtonUp += (s, e) =>
+            {
+                if (_mDraggingOwner == g && _mDraggingRole == "Dot2")
+                {
+                    _mDraggingOwner = null;
+                    _mDraggingRole = null;
+                    _mDraggingDot = null;
+                    g.PerpLine2.ReleaseMouseCapture();
+                }
+                e.Handled = true;
+            };
+            
             g.UpdateLine(); g.UpdateLabel(FormatDistance(g.Distance));
             return g;
         }
diff --git a/XP.ImageProcessing.RoiControl/Models/MeasureGroup.cs b/XP.ImageProcessing.RoiControl/Models/MeasureGroup.cs
index 32ba2aa..0c93043 100644
--- a/XP.ImageProcessing.RoiControl/Models/MeasureGroup.cs
+++ b/XP.ImageProcessing.RoiControl/Models/MeasureGroup.cs
@@ -9,12 +9,21 @@ namespace XP.ImageProcessing.RoiControl.Models
     /// <summary>一次点点距测量的所有视觉元素</summary>
     public class MeasureGroup
     {
+        // 保留原有圆点属性以兼容其他代码
         public Ellipse Dot1 { get; set; }
         public Ellipse Dot2 { get; set; }
+        
+        // 新增：垂直线段（替代圆点的视觉表现）
+        public Line PerpLine1 { get; set; }
+        public Line PerpLine2 { get; set; }
+        
         public Line Line { get; set; }
         public TextBlock Label { get; set; }
         public Point P1 { get; set; }
         public Point P2 { get; set; }
+        
+        /// <summary>垂直线段长度（像素）</summary>
+        public double PerpLineLength { get; set; } = 10.0;
 
         public double Distance
         {
@@ -30,6 +39,46 @@ namespace XP.ImageProcessing.RoiControl.Models
             Line.X1 = P1.X; Line.Y1 = P1.Y;
             Line.X2 = P2.X; Line.Y2 = P2.Y;
             Line.Visibility = Visibility.Visible;
+            
+            // 更新垂直线段位置
+            UpdatePerpLines();
+        }
+
+        /// <summary>更新两条垂直线段的位置</summary>
+        public void UpdatePerpLines()
+        {
+            if (PerpLine1 == null || PerpLine2 == null) return;
+            
+            // 计算两点连线的方向向量
+            double dx = P2.X - P1.X;
+            double dy = P2.Y - P1.Y;
+            double len = Math.Sqrt(dx * dx + dy * dy);
+            
+            if (len < 0.001) return; // 避免除零
+            
+            // 归一化方向向量
+            double ux = dx / len;
+            double uy = dy / len;
+            
+            // 垂直方向向量 (-uy, ux)
+            double vx = -uy;
+            double vy = ux;
+            
+            // P1处的垂直线段
+            double halfLen1 = PerpLineLength / 2;
+            PerpLine1.X1 = P1.X + vx * halfLen1;
+            PerpLine1.Y1 = P1.Y + vy * halfLen1;
+            PerpLine1.X2 = P1.X - vx * halfLen1;
+            PerpLine1.Y2 = P1.Y - vy * halfLen1;
+            PerpLine1.Visibility = Visibility.Visible;
+            
+            // P2处的垂直线段
+            double halfLen2 = PerpLineLength / 2;
+            PerpLine2.X1 = P2.X + vx * halfLen2;
+            PerpLine2.Y1 = P2.Y + vy * halfLen2;
+            PerpLine2.X2 = P2.X - vx * halfLen2;
+            PerpLine2.Y2 = P2.Y - vy * halfLen2;
+            PerpLine2.Visibility = Visibility.Visible;
         }
 
         public void UpdateLabel(string distanceText = null)