diff --git a/bullet.py b/bullet.py
index 1302f47..195965d 100644
--- a/bullet.py
+++ b/bullet.py
@@ -27,4 +27,8 @@ class Bullet(Sprite):
             # 更新表示子弹位置的小数值
             self.y -= self.speed_factor
             # 更新表示子弹的rect的位置
-            self.rect.y = self.y
\ No newline at end of file
+            self.rect.y = self.y
+
+            def draw_bullet(self):
+                """在屏幕上绘制子弹"""
+                pygame.draw.rect(self.screen, self.color, self.rect)
\ No newline at end of file