diff --git a/func/Module_SA_label_v2.py b/func/Module_SA_label_v2.py
index 59f13f1..20ce6e0 100644
--- a/func/Module_SA_label_v2.py
+++ b/func/Module_SA_label_v2.py
@@ -911,7 +911,7 @@ class MainWindow_SA_label(QMainWindow):
         end_point = start_point + self.config["WindowSignalSecond"] * plot_freq
         for channel, ax in self.channel_to_ax.items():
             if self.channel_to_best_fit_checkbox[channel] is not None and (
-            not self.channel_to_best_fit_checkbox[channel].isChecked()):
+                    not self.channel_to_best_fit_checkbox[channel].isChecked()):
                 continue
             signal_max = self.data.channel[channel][start_point: end_point].max()
             signal_min = self.data.channel[channel][start_point: end_point].min()
@@ -1055,8 +1055,8 @@ class MainWindow_SA_label(QMainWindow):
 
                     new_width = max(new_width, 1)  # 最小宽度为1秒
 
-                    self.selected_event_rect.set_x(new_start)
-                    self.selected_event_rect.set_width(new_width)
+                    self.__set_x_and_width__(self.selected_event_rect, new_start, new_width)
+
 
             else:
                 if self.press is not None and self.press[1] == 'empty':
@@ -1255,8 +1255,7 @@ class MainWindow_SA_label(QMainWindow):
             event_right = self.selected_event_info["correct_End"] if self.selected_event_info["isLabeled"] != -1 else \
                 self.selected_event_info["End"]
             if x_rect != event_left or width != (event_right - event_left):
-                self.selected_event_rect.set_x(event_left)
-                self.selected_event_rect.set_width(event_right - event_left)
+                self.__set_x_and_width__(self.selected_event_rect, event_left, event_right - event_left)
                 self.canvas.draw_idle()
 
     @overrides
@@ -2005,7 +2004,7 @@ class MainWindow_SA_label(QMainWindow):
     def __get_x_and_width__(self, event_rect):
         """Get the width of a rectangle in data coordinates."""
         # matplotlib >=3.9 axvspan 返回的是一个Rectangle对象
-        # matplorlib < 3.9 axvspan 返回的是一个PolyCollection对象
+        # matplorlib < 3.9 axvspan 返回的是一个Poly对象
         if isinstance(event_rect, Rectangle):
             x = event_rect.get_x()
             width = event_rect.get_width()
@@ -2017,6 +2016,23 @@ class MainWindow_SA_label(QMainWindow):
         else:
             raise TypeError("Unsupported event_rect type")
         return x, width
+
+    def __set_x_and_width__(self, event_rect, x, width):
+        """Set the x and width of a rectangle in data coordinates."""
+        if isinstance(event_rect, Rectangle):
+            event_rect.set_x(x)
+            event_rect.set_width(width)
+        elif isinstance(event_rect, Polygon):
+            verts = event_rect.get_xy()
+            verts[0, 0] = x
+            verts[1, 0] = x
+            verts[2, 0] = x + width
+            verts[3, 0] = x + width
+            event_rect.set_xy(verts)
+        else:
+            raise TypeError("Unsupported event_rect type")
+
+
 class CustomNavigationToolbar(NavigationToolbar2QT):
     def __init__(self, canvas, parent):
         super().__init__(canvas, parent)