diff --git a/main.py b/main.py
index 724fc84b006cef4f6f7a992e88f42bbfa72ee8c7..0600e3ede394740d731af9f9d3951b3513dbb5dc 100644
--- a/main.py
+++ b/main.py
@@ -69,23 +69,27 @@ class Snake(object):
 # 食物类
 # 方法： 放置/移除
 # 点以25为单位
-class Food:
+class Food(object):
     def __init__(self):
         self.rect = pygame.Rect(-25,0,25,25)
         
     def remove(self):
         self.rect.x=-25
     
-    def set(self):
+
+    def set(self, snake):
         if self.rect.x == -25:
-            allpos = []
-            # 不靠墙太近 25 ~ SCREEN_X-25 之间
-            for pos in range(25,SCREEN_X-25,25):
-                allpos.append(pos)
-            self.rect.left = random.choice(allpos)
-            self.rect.top  = random.choice(allpos)
-            print(self.rect)
-            
+            while True:
+                allpos = []
+                # 不靠墙太近 25 ~ SCREEN_X-25 之间
+                for pos in range(25, SCREEN_X - 25, 25):
+                    allpos.append(pos)
+                self.rect.left = random.choice(allpos)
+                self.rect.top = random.choice(allpos)
+                
+                # Check if the new position overlaps with any part of the snake's body
+                if not any(self.rect.colliderect(node) for node in snake.body):
+                    break
 
 def show_text(screen, pos, text, color, font_bold = False, font_size = 60, font_italic = False):   
     #获取系统字体，并设置文字大小  
@@ -147,7 +151,7 @@ def main():
             snake.addnode()
         
         # 食物投递
-        food.set()
+        food.set(snake)
         pygame.draw.rect(screen,(136,0,21),food.rect,0)
         
         # 显示分数文字