diff --git a/frontend/mobile-app/lib/features/authorization/presentation/widgets/stickman_race_widget.dart b/frontend/mobile-app/lib/features/authorization/presentation/widgets/stickman_race_widget.dart
index 46ab7391..3c027636 100644
--- a/frontend/mobile-app/lib/features/authorization/presentation/widgets/stickman_race_widget.dart
+++ b/frontend/mobile-app/lib/features/authorization/presentation/widgets/stickman_race_widget.dart
@@ -234,17 +234,23 @@ class _StickmanRaceWidgetState extends State<StickmanRaceWidget>
         // 添加上下弹跳效果
         final bounce = _bounceController.value * 3;
 
-        // 计算可用宽度：屏幕宽度 - 页面padding(32) - 容器padding(32) - 红旗区域(40)
-        // 让火柴人在100%时正好到达红旗位置
+        // 计算可用宽度，让火柴人在100%时正好到达红旗位置
         final screenWidth = MediaQuery.of(context).size.width;
         final containerWidth = screenWidth - 32 - 32; // 页面padding + 容器padding
-        final stickmanWidth = 60.0; // 火柴人+数量标签的宽度
-        final flagAreaWidth = 40.0; // 红旗区域宽度
+        final stickmanColumnWidth = 60.0; // 火柴人+数量标签列的宽度
+        final flagRightMargin = 8.0; // 红旗的right值
+        final flagWidth = 24.0; // 红旗图标宽度
         final nicknameAreaWidth = 65.0; // 昵称区域宽度
         final gap = 4.0; // 昵称和火柴人之间的最小间距
-        // 火柴人可移动的范围：从昵称右边开始到红旗位置
-        final availableWidth = containerWidth - nicknameAreaWidth - gap - stickmanWidth - flagAreaWidth;
-        final stickmanLeftPosition = nicknameAreaWidth + gap + availableWidth * horizontalProgress;
+
+        // 100%时火柴人列的右边缘应该对齐红旗左边缘
+        // 红旗左边位置 = containerWidth - flagRightMargin - flagWidth
+        // 火柴人列右边 = stickmanLeftPosition + stickmanColumnWidth
+        // 所以 100% 时: stickmanLeftPosition = containerWidth - flagRightMargin - flagWidth - stickmanColumnWidth
+        final endPosition = containerWidth - flagRightMargin - flagWidth - stickmanColumnWidth;
+        final startPosition = nicknameAreaWidth + gap;
+        final availableWidth = endPosition - startPosition;
+        final stickmanLeftPosition = startPosition + availableWidth * horizontalProgress;
 
         return Positioned(
           left: 0,