diff --git a/docs/chapter_data_structure/basic_data_types.md b/docs/chapter_data_structure/basic_data_types.md
index e0e33ec15..32929ba30 100644
--- a/docs/chapter_data_structure/basic_data_types.md
+++ b/docs/chapter_data_structure/basic_data_types.md
@@ -138,7 +138,7 @@
     ```rust title=""
     // 使用多种基本数据类型来初始化数组
     let numbers: Vec<i32> = vec![0; 5];
-    let decimals: Vec<float> = vec![0.0, 5];
+    let decimals: Vec<f32> = vec![0.0, 5];
     let characters: Vec<char> = vec!['0'; 5];
     let bools: Vec<bool> = vec![false; 5];
     ```