diff --git a/launcher.py b/launcher.py
index c1512a9..6912d8f 100644
--- a/launcher.py
+++ b/launcher.py
@@ -67,7 +67,7 @@ def create_launcher():
     
     # 说明
     info_label = tk.Label(root, 
-                         text="提示：首次使用请先点击"配置管理"设置参数",
+                         text="提示：首次使用请先点击配置管理设置参数",
                          font=('Arial', 9), 
                          fg='gray')
     info_label.pack(side=tk.BOTTOM, pady=10)
diff --git a/preview.py b/preview.py
index da87660..7460f80 100644
--- a/preview.py
+++ b/preview.py
@@ -283,6 +283,7 @@ class PreviewWindow:
                             photo = ImageTk.PhotoImage(image=pil_image)
                             # 保持引用，避免被GC
                             self.photo_objects[idx] = photo
+                            self._grid_photos.append(photo)
                             
                             images_to_draw.append((photo, center_x, center_y))
                             texts_to_draw.append((center_x, y + 15, name, 'white'))
@@ -416,6 +417,8 @@ class PreviewWindow:
         canvas.pack(fill=tk.BOTH, expand=True)
         
         photo_obj = {}
+        # 持久引用大窗当前帧 PhotoImage，避免GC
+        self._large_photos = []
         
         def update_large_once():
             if not self.running or not self.large_window.winfo_exists():
@@ -441,8 +444,9 @@ class PreviewWindow:
                         resized_frame = cv2.cvtColor(resized_frame, cv2.COLOR_BGR2RGB)
                     pil_image = Image.fromarray(resized_frame)
                     photo = ImageTk.PhotoImage(image=pil_image)
-                    # 保存引用到字典，确保不被GC
+                    # 保存引用到字典和列表，确保不被GC
                     photo_obj['img'] = photo
+                    self._large_photos = [photo]
 
                     # 清空并绘制新图像
                     canvas.delete("all")