diff --git a/AIStudio.Wpf.DiagramDesigner/Models/Serializables/SelectableDesignerItemBase.cs b/AIStudio.Wpf.DiagramDesigner/Models/Serializables/SelectableDesignerItemBase.cs
index 9b111e2..73476d1 100644
--- a/AIStudio.Wpf.DiagramDesigner/Models/Serializables/SelectableDesignerItemBase.cs
+++ b/AIStudio.Wpf.DiagramDesigner/Models/Serializables/SelectableDesignerItemBase.cs
@@ -182,6 +182,26 @@ namespace AIStudio.Wpf.DiagramDesigner
             get; set;
         }
 
+        [JsonIgnore]
+        [XmlIgnore]
+        public double LeftArrowSize
+        {
+            get
+            {
+                throw new NotImplementedException();
+            }
+        }
+
+        [JsonIgnore]
+        [XmlIgnore]
+        public double RightArrowSize
+        {
+            get
+            {
+                throw new NotImplementedException();
+            }
+        }
+
         public event PropertyChangedEventHandler PropertyChanged;
     }
 
diff --git a/AIStudio.Wpf.DiagramDesigner/PathGenerators/PathGenerators.Boundary.cs b/AIStudio.Wpf.DiagramDesigner/PathGenerators/PathGenerators.Boundary.cs
index cce913a..42718a5 100644
--- a/AIStudio.Wpf.DiagramDesigner/PathGenerators/PathGenerators.Boundary.cs
+++ b/AIStudio.Wpf.DiagramDesigner/PathGenerators/PathGenerators.Boundary.cs
@@ -16,8 +16,8 @@ namespace AIStudio.Wpf.DiagramDesigner
 
             route = GetRouteWithMiddlePoints(_, link, route);
 
-            double sourceAngle = SourceMarkerAdjustement(route, link.ColorViewModel.LeftArrowPathStyle == ArrowPathStyle.None ? 0d : (double)link.ColorViewModel.LeftArrowSizeStyle);
-            double targetAngle = TargetMarkerAdjustement(route, link.ColorViewModel.RightArrowPathStyle == ArrowPathStyle.None ? 0d : (double)link.ColorViewModel.RightArrowPathStyle);
+            double sourceAngle = SourceMarkerAdjustement(route, link.ColorViewModel.LeftArrowSize);
+            double targetAngle = TargetMarkerAdjustement(route, link.ColorViewModel.RightArrowSize);
 
             DoShift(route, link);
 
@@ -36,7 +36,7 @@ namespace AIStudio.Wpf.DiagramDesigner
                 link.SourceConnectorInfo.MiddlePosition,
                 link.SourceConnectorInfo.Orientation,
                 link.SinkConnectorInfo.MiddlePosition,
-                link.IsFullConnection ? link.SinkConnectorInfoFully.Orientation : (link.SinkConnectorInfo.Position.Y >= link.SourceConnectorInfo.Position.Y ? ConnectorOrientation.Top : ConnectorOrientation.Bottom),
+                link.IsFullConnection ? link.SinkConnectorInfoFully.Orientation : (link.SinkConnectorInfo.MiddlePosition.Y >= link.SourceConnectorInfo.MiddlePosition.Y ? ConnectorOrientation.Top : ConnectorOrientation.Bottom),
                 _.GridCellSize,
                 _.GridMargin);
 
diff --git a/AIStudio.Wpf.DiagramDesigner/PathGenerators/PathGenerators.Corner.cs b/AIStudio.Wpf.DiagramDesigner/PathGenerators/PathGenerators.Corner.cs
index d54d325..034845b 100644
--- a/AIStudio.Wpf.DiagramDesigner/PathGenerators/PathGenerators.Corner.cs
+++ b/AIStudio.Wpf.DiagramDesigner/PathGenerators/PathGenerators.Corner.cs
@@ -19,8 +19,8 @@ namespace AIStudio.Wpf.DiagramDesigner
             else
                 route = GetRouteWithPartConnectionLine(_, link, route);
 
-            double sourceAngle = SourceMarkerAdjustement(route, link.ColorViewModel.LeftArrowPathStyle == ArrowPathStyle.None ? 0d : (double)link.ColorViewModel.LeftArrowSizeStyle);
-            double targetAngle = TargetMarkerAdjustement(route, link.ColorViewModel.RightArrowPathStyle == ArrowPathStyle.None ? 0d : (double)link.ColorViewModel.RightArrowPathStyle);
+            double sourceAngle = SourceMarkerAdjustement(route, link.ColorViewModel.LeftArrowSize);
+            double targetAngle = TargetMarkerAdjustement(route, link.ColorViewModel.RightArrowSize);
 
             DoShift(route, link);
 
diff --git a/AIStudio.Wpf.DiagramDesigner/PathGenerators/PathGenerators.Smooth.cs b/AIStudio.Wpf.DiagramDesigner/PathGenerators/PathGenerators.Smooth.cs
index a87921e..815ca47 100644
--- a/AIStudio.Wpf.DiagramDesigner/PathGenerators/PathGenerators.Smooth.cs
+++ b/AIStudio.Wpf.DiagramDesigner/PathGenerators/PathGenerators.Smooth.cs
@@ -17,8 +17,8 @@ namespace AIStudio.Wpf.DiagramDesigner
 
             route = GetRouteWithCurvePoints(link, route);
 
-            double sourceAngle = SourceMarkerAdjustement(route, link.ColorViewModel.LeftArrowPathStyle == ArrowPathStyle.None ? 0d : (double)link.ColorViewModel.LeftArrowSizeStyle);
-            double targetAngle = TargetMarkerAdjustement(route, link.ColorViewModel.RightArrowPathStyle == ArrowPathStyle.None ? 0d : (double)link.ColorViewModel.RightArrowPathStyle);
+            double sourceAngle = SourceMarkerAdjustement(route, link.ColorViewModel.LeftArrowSize);
+            double targetAngle = TargetMarkerAdjustement(route, link.ColorViewModel.RightArrowSize);
 
             DoShift(route, link);
 
@@ -28,8 +28,8 @@ namespace AIStudio.Wpf.DiagramDesigner
 
         private static PathGeneratorResult CurveThroughPoints(PointBase[] route, ConnectorViewModel link)
         {
-            double sourceAngle = SourceMarkerAdjustement(route, (double)link.ColorViewModel.LeftArrowSizeStyle);
-            double targetAngle = TargetMarkerAdjustement(route, (double)link.ColorViewModel.RightArrowPathStyle);
+            double sourceAngle = SourceMarkerAdjustement(route, link.ColorViewModel.LeftArrowSize);
+            double targetAngle = TargetMarkerAdjustement(route, link.ColorViewModel.RightArrowSize);
 
             BezierSpline.GetCurveControlPoints(route, out var firstControlPoints, out var secondControlPoints);
             var paths = new string[firstControlPoints.Length];
diff --git a/AIStudio.Wpf.DiagramDesigner/PathGenerators/PathGenerators.Straight.cs b/AIStudio.Wpf.DiagramDesigner/PathGenerators/PathGenerators.Straight.cs
index ae09332..e427c4e 100644
--- a/AIStudio.Wpf.DiagramDesigner/PathGenerators/PathGenerators.Straight.cs
+++ b/AIStudio.Wpf.DiagramDesigner/PathGenerators/PathGenerators.Straight.cs
@@ -9,8 +9,8 @@ namespace AIStudio.Wpf.DiagramDesigner
         {
             route = ConcatRouteAndSourceAndTarget(route, source, target);
 
-            double sourceAngle = SourceMarkerAdjustement(route, (double)link.ColorViewModel.LeftArrowSizeStyle);
-            double targetAngle = TargetMarkerAdjustement(route, (double)link.ColorViewModel.RightArrowPathStyle);
+            double sourceAngle = SourceMarkerAdjustement(route, link.ColorViewModel.LeftArrowSize);
+            double targetAngle = TargetMarkerAdjustement(route, link.ColorViewModel.RightArrowSize);
 
             DoShift(route, link);
 
diff --git a/AIStudio.Wpf.DiagramDesigner/PathGenerators/PathGenerators.Utils.cs b/AIStudio.Wpf.DiagramDesigner/PathGenerators/PathGenerators.Utils.cs
index 46982d0..88e1955 100644
--- a/AIStudio.Wpf.DiagramDesigner/PathGenerators/PathGenerators.Utils.cs
+++ b/AIStudio.Wpf.DiagramDesigner/PathGenerators/PathGenerators.Utils.cs
@@ -9,18 +9,20 @@ namespace AIStudio.Wpf.DiagramDesigner
         public static double SourceMarkerAdjustement(PointBase[] route, double markerWidth)
         {
             var angleInRadians = Math.Atan2(route[1].Y - route[0].Y, route[1].X - route[0].X) + Math.PI;
-            var xChange = markerWidth * Math.Cos(angleInRadians);
-            var yChange = markerWidth * Math.Sin(angleInRadians);
-            route[0] = new PointBase(route[0].X - xChange, route[0].Y - yChange);
+            //不需要留出箭头的位置
+            //var xChange = markerWidth * Math.Cos(angleInRadians);
+            //var yChange = markerWidth * Math.Sin(angleInRadians);
+            //route[0] = new PointBase(route[0].X - xChange, route[0].Y - yChange);
             return angleInRadians * 180 / Math.PI;
         }
 
         public static double TargetMarkerAdjustement(PointBase[] route, double markerWidth)
         {
             var angleInRadians = Math.Atan2(route[route.Length - 1].Y - route[route.Length - 2].Y, route[route.Length - 1].X - route[route.Length - 2].X);
-            var xChange = markerWidth * Math.Cos(angleInRadians);
-            var yChange = markerWidth * Math.Sin(angleInRadians);
-            route[route.Length - 1] = new PointBase(route[route.Length - 1].X - xChange, route[route.Length - 1].Y - yChange);
+            //不需要留出箭头的位置
+            //var xChange = markerWidth * Math.Cos(angleInRadians);
+            //var yChange = markerWidth * Math.Sin(angleInRadians);
+            //route[route.Length - 1] = new PointBase(route[route.Length - 1].X - xChange, route[route.Length - 1].Y - yChange);
             return angleInRadians * 180 / Math.PI;
         }
 
diff --git a/AIStudio.Wpf.DiagramDesigner/ViewModels/AdditionViewModel/ColorViewModel.cs b/AIStudio.Wpf.DiagramDesigner/ViewModels/AdditionViewModel/ColorViewModel.cs
index 30a9c37..76025de 100644
--- a/AIStudio.Wpf.DiagramDesigner/ViewModels/AdditionViewModel/ColorViewModel.cs
+++ b/AIStudio.Wpf.DiagramDesigner/ViewModels/AdditionViewModel/ColorViewModel.cs
@@ -201,6 +201,22 @@ namespace AIStudio.Wpf.DiagramDesigner
                 }
             }
         }
+
+        public double LeftArrowSize
+        {
+            get
+            {
+                return LeftArrowPathStyle == ArrowPathStyle.None ? 0d : (double)LeftArrowSizeStyle;
+            }
+        }
+
+        public double RightArrowSize
+        {
+            get
+            {
+                return RightArrowPathStyle == ArrowPathStyle.None ? 0d : (double)RightArrowSizeStyle;
+            }
+        }
     }
 
 
diff --git a/AIStudio.Wpf.DiagramDesigner/ViewModels/AdditionViewModel/IColorViewModel.cs b/AIStudio.Wpf.DiagramDesigner/ViewModels/AdditionViewModel/IColorViewModel.cs
index 06f2c3f..b83645c 100644
--- a/AIStudio.Wpf.DiagramDesigner/ViewModels/AdditionViewModel/IColorViewModel.cs
+++ b/AIStudio.Wpf.DiagramDesigner/ViewModels/AdditionViewModel/IColorViewModel.cs
@@ -3,19 +3,55 @@ using System.Collections.Generic;
 using System.ComponentModel;
 using System.Text;
 using System.Windows.Media;
+using AIStudio.Wpf.DiagramDesigner.Geometrys;
 
 namespace AIStudio.Wpf.DiagramDesigner
 {
     public interface IColorViewModel
     {
-        IColorObject LineColor { get; set; }
-        IColorObject FillColor { get; set; }
-        Color ShadowColor { get; set; }
-        double LineWidth { get; set; }
-        ArrowPathStyle LeftArrowPathStyle { get; set; }
-        ArrowPathStyle RightArrowPathStyle { get; set; }
-        ArrowSizeStyle LeftArrowSizeStyle { get; set; }
-        ArrowSizeStyle RightArrowSizeStyle { get; set; }
+        IColorObject LineColor
+        {
+            get; set;
+        }
+        IColorObject FillColor
+        {
+            get; set;
+        }
+        Color ShadowColor
+        {
+            get; set;
+        }
+        double LineWidth
+        {
+            get; set;
+        }
+        ArrowPathStyle LeftArrowPathStyle
+        {
+            get; set;
+        }
+        ArrowPathStyle RightArrowPathStyle
+        {
+            get; set;
+        }
+        ArrowSizeStyle LeftArrowSizeStyle
+        {
+            get; set;
+        }
+        ArrowSizeStyle RightArrowSizeStyle
+        {
+            get; set;
+        }
+
+        double LeftArrowSize
+        {
+            get;
+        }
+
+        double RightArrowSize
+        {
+            get;
+        }
+
         event PropertyChangedEventHandler PropertyChanged;
     }
 }
diff --git a/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/ConnectorViewModel.cs b/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/ConnectorViewModel.cs
index 3c93c4d..29d9fec 100644
--- a/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/ConnectorViewModel.cs
+++ b/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/ConnectorViewModel.cs
@@ -497,9 +497,9 @@ namespace AIStudio.Wpf.DiagramDesigner
             }
             else
             {
-                var source = GetPortPositionBasedOnAlignment(SourceConnectorInfo, ColorViewModel.LeftArrowSizeStyle);
-                var target = GetPortPositionBasedOnAlignment(SinkConnectorInfoFully, ColorViewModel.RightArrowSizeStyle);
-                return (source, target ?? OnGoingPosition);
+                var source = SourceConnectorInfo.MiddlePosition;//GetPortPositionBasedOnAlignment(SourceConnectorInfo, ColorViewModel.LeftArrowSizeStyle);
+                var target = SinkConnectorInfo.MiddlePosition;// GetPortPositionBasedOnAlignment(SinkConnectorInfoFully, ColorViewModel.RightArrowSizeStyle);
+                return (source, target);
             }
         }