diff --git a/preview.py b/preview.py
index 9d558ea..9ca0475 100644
--- a/preview.py
+++ b/preview.py
@@ -316,6 +316,32 @@ class PreviewWindow:
                             canvas.create_text(x, y, text=text, fill=color, font=('Arial', 10))
                     except Exception as e:
                         print(f"绘制文本错误: {e}")
+                
+                # 绘制分割线，区分不同的采集卡窗口
+                try:
+                    # 绘制垂直分割线（列之间的分割线）
+                    for col in range(1, columns):
+                        x = col * cell_width
+                        canvas.create_line(
+                            x, 0, 
+                            x, canvas_height,
+                            fill='white', 
+                            width=2,
+                            dash=(5, 5)  # 虚线效果，让分割线更明显
+                        )
+                    
+                    # 绘制水平分割线（行之间的分割线）
+                    for row in range(1, rows):
+                        y = row * cell_height
+                        canvas.create_line(
+                            0, y,
+                            canvas_width, y,
+                            fill='white',
+                            width=2,
+                            dash=(5, 5)  # 虚线效果
+                        )
+                except Exception as e:
+                    print(f"绘制分割线错误: {e}")
                         
             except Exception as e:
                 print(f"更新帧错误: {e}")