diff --git a/face_rec.py b/face_rec.py
index 909f497..2f9ef08 100644
--- a/face_rec.py
+++ b/face_rec.py
@@ -80,6 +80,7 @@ class FaceRecognitionSystem:
             'quality': 0,
             'face_detected': False,
             'face_box': None,
+            'face_box_mirrored': False,  # 标记 face_box 是否已翻转
             'person_name': None,
             'person_role': None,
             'similarity': 0,
@@ -1709,6 +1710,7 @@ class FaceRecognitionSystem:
 
                         self.display_info['face_detected'] = True
                         self.display_info['face_box'] = face['box']
+                        self.display_info['face_box_mirrored'] = False  # 重置翻转标志
 
                         # 记录人脸出现时间
                         if self.face_present_start is None:
@@ -1815,8 +1817,8 @@ class FaceRecognitionSystem:
                 # 镜像翻转：使画面与实际场景一致（在绘制信息之前）
                 frame = cv2.flip(frame, 1)
 
-                # 调整 face_box 坐标以适应镜像翻转
-                if self.display_info['face_detected'] and self.display_info['face_box']:
+                # 调整 face_box 坐标以适应镜像翻转（只翻转一次）
+                if self.display_info['face_detected'] and self.display_info['face_box'] and not self.display_info['face_box_mirrored']:
                     h_flip, w_flip = frame.shape[:2]
                     box = self.display_info['face_box']
                     x_min = int(box['x_min'])
@@ -1824,6 +1826,7 @@ class FaceRecognitionSystem:
                     # 水平翻转坐标
                     self.display_info['face_box']['x_min'] = w_flip - 1 - x_max
                     self.display_info['face_box']['x_max'] = w_flip - 1 - x_min
+                    self.display_info['face_box_mirrored'] = True
 
                 # 绘制信息
                 display_frame = self.draw_info_on_frame(frame)
@@ -1832,8 +1835,8 @@ class FaceRecognitionSystem:
                 h, w = display_frame.shape[:2]
                 center_x = w // 2
                 center_y = h // 2
-                # 椭圆参数：中心点、长轴、短轴、旋转角度、起始角度、结束角度
-                cv2.ellipse(display_frame, (center_x, center_y), (75, 100), 0, 0, 360, (0, 200, 0), 2)
+                # 椭圆参数：中心点、宽半轴、高半轴、旋转角度、起始角度、结束角度
+                cv2.ellipse(display_frame, (center_x, center_y), (90, 120), 0, 0, 360, (0, 200, 0), 2)
 
                 # 添加提示文字（使用中文支持函数）
                 guide_text = "请将脸部对准圆圈内"