diff --git a/src/scenes/base_scene.py b/src/scenes/base_scene.py
index 20ba901..89379fb 100644
--- a/src/scenes/base_scene.py
+++ b/src/scenes/base_scene.py
@@ -1,15 +1,14 @@
 import pygame
 
 class BaseScene:
-    def __init__(self, screen: pygame.Surface, clock: pygame.time.Clock):
+    def __init__(self, screen: pygame.Surface):
         """
         初始化场景，接收并保存画布、计时器
         """
         self.screen = screen
-        self.clock = clock
         self.next_scene = None
 
-    def update(self):
+    def update(self, dt=0):
         """
         场景的每帧更新逻辑
         """
diff --git a/src/scenes/empty_scene.py b/src/scenes/empty_scene.py
index 05d9c0c..2878547 100644
--- a/src/scenes/empty_scene.py
+++ b/src/scenes/empty_scene.py
@@ -4,10 +4,10 @@ from src.scenes.base_scene import BaseScene
 class EmptyScene(BaseScene):
     name = "EmptyScene"  # 场景名称
 
-    def __init__(self, screen, clock):
-        super().__init__(screen, clock)
+    def __init__(self, screen):
+        super().__init__(screen)
 
-    def update(self):
+    def update(self, dt=0):
         """
         场景每帧更新逻辑
         """
diff --git a/src/scenes/game_scene.py b/src/scenes/game_scene.py
index a4c0eca..a2842b7 100644
--- a/src/scenes/game_scene.py
+++ b/src/scenes/game_scene.py
@@ -8,8 +8,8 @@ from src.scenes.base_scene import BaseScene
 
 class GameScene(BaseScene):
     name = "GameScene"
-    def __init__(self, screen, clock):
-        super().__init__(screen, clock)
+    def __init__(self, screen):
+        super().__init__(screen)
         # 初始化音乐
         pygame.mixer.init()
         # 播放并循环音乐
@@ -32,7 +32,7 @@ class GameScene(BaseScene):
         self.RED = (255, 0, 0)
         self.BLUE = (0, 0, 255)
 
-    def update(self):
+    def update(self, dt=0):
         if self.back_status:
             self.switch_to_scene("MainMenuScene")
         if self.Left_status and self.dirty_x >= 0:
diff --git a/src/scenes/main_menu_scene.py b/src/scenes/main_menu_scene.py
index 8bf854a..6a4766a 100644
--- a/src/scenes/main_menu_scene.py
+++ b/src/scenes/main_menu_scene.py
@@ -12,11 +12,11 @@ class MainMenuScene(BaseScene):
     """
     主菜单场景，显示提示信息，展示雨天特效
     """
-    def __init__(self, screen, clock):
+    def __init__(self, screen):
         """
         初始化函数，初始化按钮按下状态、雨滴列表
         """
-        super().__init__(screen, clock)
+        super().__init__(screen)
         self.button_status = False
         self.mouse_status = None
         self.mouse_last_status = None
@@ -44,7 +44,7 @@ class MainMenuScene(BaseScene):
         # 鼠标位置
         self.mouse_pos = (0, 0)
 
-    def update(self):
+    def update(self, dt=0):
         # 按键按下则切换场景
         if self.button_status:
             self.switch_to_scene("GameScene")
@@ -62,7 +62,7 @@ class MainMenuScene(BaseScene):
         self.handle_keyboard()
 
         # 雨滴坠落
-        self.rain_fall()
+        self.rain_fall(dt)
 
         # 更新鼠标位置
         self.mouse_pos = pygame.mouse.get_pos()
@@ -216,12 +216,10 @@ class MainMenuScene(BaseScene):
             self.__rain_list_append(status)
 
 
-    def rain_fall(self):
+    def rain_fall(self, dt):
         """
         展示雨滴画面
         """
-        dt = self.clock.tick()
-
         for rain in self.rain_list:
 
             # 当状态在区间1时绘制雨滴线条
diff --git a/start.py b/start.py
index fea8357..33834f2 100644
--- a/start.py
+++ b/start.py
@@ -19,7 +19,7 @@ class Game:
         # 场景字典
         self.game_scenes = scene_dict
         # 当前场景
-        self.scene = self.game_scenes["MainMenuScene"](self.screen, self.clock)
+        self.scene = self.game_scenes["MainMenuScene"](self.screen)
 
         # 运行循环
         self.running = True
@@ -27,6 +27,8 @@ class Game:
 
     def run(self):
         while self.running:
+            # 更新每帧时间
+            dt = self.clock.tick()
             # 事件处理
             for event in pygame.event.get():  # 这里已经获取了事件，事件队列被清空，在场景的update中再次获取将没有事件
                 if event.type == pygame.QUIT:
@@ -37,13 +39,13 @@ class Game:
             if self.scene.next_scene is not None:
                 if self.scene.next_scene in self.game_scenes.keys():
                     scene_class = self.game_scenes[self.scene.next_scene]
-                    self.scene = scene_class(self.screen, self.clock)
+                    self.scene = scene_class(self.screen)
 
             # 清屏
             self.screen.fill(GameConfig.bg_color)
 
             # 场景每帧更新逻辑运行
-            self.scene.update()
+            self.scene.update(dt)
             # 当场景的下一场景为exit时退出游戏
             if self.scene.next_scene == "exit":
                 self.running = False
@@ -52,4 +54,4 @@ class Game:
             pygame.display.update()
 
 if __name__ == "__main__":
-    Game()
\ No newline at end of file
+    Game()