diff --git a/bullet.py b/bullet.py
index 61ed5ff..cb10ee3 100644
--- a/bullet.py
+++ b/bullet.py
@@ -73,3 +73,7 @@ class BossBullet(Sprite):
         # 更新rect位置
         self.rect.y = self.y
         self.rect.x = self.x
+
+    def draw_bullet(self):
+        """在屏幕上绘制子弹"""
+        pygame.draw.rect(self.screen, self.color, ((self.x, self.y), (self.width, self.height)))