diff --git a/Windows/CS/Framework4.0/Toprie/Toprie/Setting.cs b/Windows/CS/Framework4.0/Toprie/Toprie/Setting.cs
index 3a68e7a..94d890a 100644
--- a/Windows/CS/Framework4.0/Toprie/Toprie/Setting.cs
+++ b/Windows/CS/Framework4.0/Toprie/Toprie/Setting.cs
@@ -1291,21 +1291,40 @@ namespace JoyD.Windows.CS
                     float scaledHalfBrushSizeX = _currentBrushSize / 2 * scaleX;
                     float scaledHalfBrushSizeY = _currentBrushSize / 2 * scaleY;
                     
-                    // 计算起始点和结束点
-                    Point startPoint = new Point(
-                        (int)(_rectangleStartPoint.X), 
-                        (int)(_rectangleStartPoint.Y)
+                    // 计算光标块的左上点和右下点
+                    Point cursorTopLeft = new Point(
+                        (int)(currentImagePoint.X - scaledHalfBrushSizeX), 
+                        (int)(currentImagePoint.Y - scaledHalfBrushSizeY)
                     );
-                    Point endPoint = new Point(
+                    Point cursorBottomRight = new Point(
                         (int)(currentImagePoint.X + scaledHalfBrushSizeX), 
                         (int)(currentImagePoint.Y + scaledHalfBrushSizeY)
                     );
                     
-                    // 无论绘制方向如何，都确保左上角为起始点
-                    int x = Math.Min(startPoint.X, endPoint.X);
-                    int y = Math.Min(startPoint.Y, endPoint.Y);
-                    int width = Math.Abs(endPoint.X - startPoint.X);
-                    int height = Math.Abs(endPoint.Y - startPoint.Y);
+                    // 起笔方块的右下点
+                    Point startBottomRight = new Point(
+                        _rectangleStartPoint.X + (int)(_currentBrushSize * scaleX),
+                        _rectangleStartPoint.Y + (int)(_currentBrushSize * scaleY)
+                    );
+                    
+                    // 确保矩形区有左上和右下两个点
+                    // 矩形区左上点=min(矩形区左上点，光标块的左上点）
+                    Point rectTopLeft = new Point(
+                        Math.Min(_rectangleStartPoint.X, cursorTopLeft.X),
+                        Math.Min(_rectangleStartPoint.Y, cursorTopLeft.Y)
+                    );
+                    
+                    // 矩形区右下点=max(矩形区右下点，光标块的右下点）
+                    Point rectBottomRight = new Point(
+                        Math.Max(startBottomRight.X, cursorBottomRight.X),
+                        Math.Max(startBottomRight.Y, cursorBottomRight.Y)
+                    );
+                    
+                    // 计算矩形坐标和大小
+                    int x = rectTopLeft.X;
+                    int y = rectTopLeft.Y;
+                    int width = rectBottomRight.X - rectTopLeft.X;
+                    int height = rectBottomRight.Y - rectTopLeft.Y;
                     
                     Rectangle rect = new Rectangle(x, y, width, height);