diff --git a/Code/Day 1_Data_Preprocessing.md b/Code/Day 1_Data_Preprocessing.md
index 5542709..d4d200c 100644
--- a/Code/Day 1_Data_Preprocessing.md	
+++ b/Code/Day 1_Data_Preprocessing.md	
@@ -41,7 +41,7 @@ Y =  labelencoder_Y.fit_transform(Y)
 ```
 ## 第5步：拆分数据集为训练集合和测试集合
 ```python
-from sklearn.cross_validation import train_test_split
+from sklearn.model_selection import train_test_split
 X_train, X_test, Y_train, Y_test = train_test_split( X , Y , test_size = 0.2, random_state = 0)
 ```
 ## 第6步：特征量化