diff --git a/my_Tetris.py b/my_Tetris.py
index 0eef9fb..ebc2822 100644
--- a/my_Tetris.py
+++ b/my_Tetris.py
@@ -54,6 +54,13 @@ def check(center):
         if cube[0] < 1 or cube[1] < 1 or cube[0] > grid_num_height \
                 or cube[1] >grid_num_width:
             return False
+        if num_list[cube[0]-1][cube[1]-1] != 0:
+            return False
+
+# 格子基础数字设为0
+num_list = []
+for i in range(25):
+    num_list.append([0] * 15)
 
 while True:
     for event in pygame.event.get():
@@ -97,7 +104,9 @@ while True:
         center[0] = center[0] + 1
         if check(center) == False:
             center[0] = center[0] - 1      
-            states = False      
+            states = False     
+            for cube in current_pos:
+                num_list[cube[0]-1][cube[1]-1] = color 
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 计算出所有小方块的行、列位置