diff --git a/game_functions.py b/game_functions.py
index 20088b5..fc9cea2 100644
--- a/game_functions.py
+++ b/game_functions.py
@@ -84,6 +84,14 @@ def check_play_button(ai_settings, screen, stats, sb, play_button, ship, aliens,
         aliens.empty()
         bullets.empty()
 
+        # 创建一群新的外星人，并让飞船居中
+        create_fleet(ai_settings, screen, ship, aliens)
+        sb.prep_ships()
+
+        # 清空外星人列表和子弹列表
+        aliens.empty()
+        bullets.empty()
+
         # 创建一群新的外星人，并让飞船居中
         create_fleet(ai_settings, screen, ship, aliens)
         ship.center_ship()
\ No newline at end of file