diff --git a/Windows/CS/Framework4.0/Toprie/Toprie/Setting.cs b/Windows/CS/Framework4.0/Toprie/Toprie/Setting.cs
index 64c08f3..be3130d 100644
--- a/Windows/CS/Framework4.0/Toprie/Toprie/Setting.cs
+++ b/Windows/CS/Framework4.0/Toprie/Toprie/Setting.cs
@@ -638,8 +638,8 @@ namespace JoyD.Windows.CS
                 // 退出温差图绘制状态，返回到就绪状态
                 ExitTempDiffDrawingMode();
             }
-            // 温差图绘制模式下，按住Ctrl键并按下左键开始绘制矩形
-            else if (_isTempDiffDrawingMode && e.Button == MouseButtons.Left && (ModifierKeys & Keys.Control) == Keys.Control)
+            // 温差图绘制/擦除模式下，按住Ctrl键并按下左键开始绘制矩形
+            else if ((_isTempDiffDrawingMode || _isEraseMode) && e.Button == MouseButtons.Left && (ModifierKeys & Keys.Control) == Keys.Control)
             {
                 // 初始化温差层图像（如果不存在或尺寸不匹配）
                 if (_tempDiffOverlayImage == null || 
@@ -1267,30 +1267,32 @@ namespace JoyD.Windows.CS
                     // 获取相对于图像的当前坐标
                     Point currentImagePoint = ControlPointToImagePoint(e.Location);
                     
+                    // 计算矩形参数
+                    int x = Math.Min(_rectangleStartPoint.X, currentImagePoint.X);
+                    int y = Math.Min(_rectangleStartPoint.Y, currentImagePoint.Y);
+                    int width = Math.Abs(currentImagePoint.X - _rectangleStartPoint.X);
+                    int height = Math.Abs(currentImagePoint.Y - _rectangleStartPoint.Y);
+                    Rectangle rect = new Rectangle(x, y, width, height);
+                    
                     // 创建临时位图用于双重缓冲，避免闪烁
                     using (Bitmap tempBitmap = new Bitmap(_tempDiffOverlayImage))
-                    {                        
+                    {                         
                         using (Graphics g = Graphics.FromImage(tempBitmap))
-                        {                            
+                        {                             
                             g.SmoothingMode = SmoothingMode.AntiAlias;
                             g.InterpolationMode = InterpolationMode.HighQualityBicubic;
                             
-                            // 计算矩形参数
-                            int x = Math.Min(_rectangleStartPoint.X, currentImagePoint.X);
-                            int y = Math.Min(_rectangleStartPoint.Y, currentImagePoint.Y);
-                            int width = Math.Abs(currentImagePoint.X - _rectangleStartPoint.X);
-                            int height = Math.Abs(currentImagePoint.Y - _rectangleStartPoint.Y);
-                            Rectangle rect = new Rectangle(x, y, width, height);
-                            
                             if (_isEraseMode)
-                            {                                
-                                // 擦除模式：使用透明色填充整个矩形区域
-                                g.CompositingMode = System.Drawing.Drawing2D.CompositingMode.SourceCopy;
-                                g.FillRectangle(Brushes.Transparent, rect);
-                                g.CompositingMode = System.Drawing.Drawing2D.CompositingMode.SourceOver;
+                            {                                 
+                                // 擦除模式：显示虚线预览框，不实际擦除（等待MouseUp时再擦除）
+                                using (Pen dashPen = new Pen(Color.White, 1))
+                                {
+                                    dashPen.DashStyle = System.Drawing.Drawing2D.DashStyle.Dash;
+                                    g.DrawRectangle(dashPen, rect);
+                                }
                             }
                             else
-                            {                                
+                            {                                 
                                 // 普通绘制模式：使用半透明填充和边框
                                 // 创建半透明的填充颜色
                                 Color fillColor = Color.FromArgb(128, selectedColor);
@@ -1300,7 +1302,7 @@ namespace JoyD.Windows.CS
                                 
                                 // 绘制矩形边框
                                 using (Pen pen = new Pen(selectedColor, _currentBrushSize))
-                                {                                    
+                                {                                     
                                     g.DrawRectangle(pen, rect);
                                 }
                             }
@@ -1308,7 +1310,7 @@ namespace JoyD.Windows.CS
                         
                         // 将临时位图复制回温差层图像
                         using (Graphics g = Graphics.FromImage(_tempDiffOverlayImage))
-                        {                            
+                        {                             
                             g.DrawImage(tempBitmap, 0, 0);
                         }
                     }
@@ -1683,13 +1685,40 @@ namespace JoyD.Windows.CS
         /// </summary>
         private void PicBoxTemp_MouseUp(object sender, MouseEventArgs e)
         {
-            // 在温差图绘制模式下，松开鼠标时重置绘制状态
-            if (_isTempDiffDrawingMode)
+            // 在温差图绘制/擦除模式下，松开鼠标时重置绘制状态
+            if (_isTempDiffDrawingMode || _isEraseMode)
             {
                 _lastDrawPoint = Point.Empty;
-                // 结束矩形绘制
-                if (_isDrawingRectangle)
+                // 结束矩形绘制/擦除
+                if (_isDrawingRectangle && picBoxTemp.Image != null)
                 {
+                    // 如果是擦除模式，在MouseUp时一次性擦除矩形区域
+                    if (_isEraseMode)
+                    {
+                        // 获取相对于图像的当前坐标
+                        Point currentImagePoint = ControlPointToImagePoint(e.Location);
+                        
+                        // 计算矩形参数
+                        int x = Math.Min(_rectangleStartPoint.X, currentImagePoint.X);
+                        int y = Math.Min(_rectangleStartPoint.Y, currentImagePoint.Y);
+                        int width = Math.Abs(currentImagePoint.X - _rectangleStartPoint.X);
+                        int height = Math.Abs(currentImagePoint.Y - _rectangleStartPoint.Y);
+                        Rectangle rect = new Rectangle(x, y, width, height);
+                        
+                        // 只有当矩形有实际大小时才执行擦除
+                        if (width > 0 && height > 0)
+                        {
+                            using (Graphics g = Graphics.FromImage(_tempDiffOverlayImage))
+                            {
+                                g.CompositingMode = System.Drawing.Drawing2D.CompositingMode.SourceCopy;
+                                g.FillRectangle(Brushes.Transparent, rect);
+                                g.CompositingMode = System.Drawing.Drawing2D.CompositingMode.SourceOver;
+                            }
+                            // 触发重绘
+                            picBoxTemp.Invalidate();
+                        }
+                    }
+                    
                     _isDrawingRectangle = false;
                     _rectangleStartPoint = Point.Empty;
                 }