diff --git a/leetcode/图解数据结构/02.替换空格/main.go b/leetcode/图解数据结构/02.替换空格/main.go
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+++ b/leetcode/图解数据结构/02.替换空格/main.go
@@ -0,0 +1,34 @@
+/*
+ * @Description: 
+ * @Version: 2.0
+ * @Autor: zhuyijun
+ * @Date: 2021-03-30 22:22:28
+ * @LastEditors: zhuyijun
+ * @LastEditTime: 2021-03-30 22:45:54
+ */
+package main
+import "fmt"
+
+/**
+剑指 Offer 05. 替换空格
+请实现一个函数，把字符串 s 中的每个空格替换成"%20"。
+
+输入：s = "We are happy."
+输出："We%20are%20happy."
+ */
+func replaceSpace(s string) string {
+	 var temp string
+    h := []byte(s)
+    for _,i :=range h{
+        if " " == string(i) {
+			temp += "%20"
+        }else{
+			temp += string(i)
+		}
+    }
+	return  temp
+}
+
+func main() {
+	fmt.Print(replaceSpace("We are happy."))
+}
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