diff --git a/problems/剑指Offer05.替换空格.md b/problems/剑指Offer05.替换空格.md
index 794f9ac5..a4c0149f 100644
--- a/problems/剑指Offer05.替换空格.md
+++ b/problems/剑指Offer05.替换空格.md
@@ -154,7 +154,54 @@ Python：
 
 
 Go：
+```go
+// 遍历添加
+func replaceSpace(s string) string {
+    b := []byte(s)
+    result := make([]byte, 0)
+    for i := 0; i < len(b); i++ {
+        if b[i] == ' ' {
+            result = append(result, []byte("%20")...)
+        } else {
+            result = append(result, b[i])
+        }
+    }
+    return string(result)
+}
 
+// 原地修改
+func replaceSpace(s string) string {
+    b := []byte(s)
+    length := len(b)
+    spaceCount := 0
+    // 计算空格数量
+    for _, v := range b {
+        if v == ' ' {
+            spaceCount++
+        }
+    }
+    // 扩展原有切片
+    resizeCount := spaceCount * 2
+    tmp := make([]byte, resizeCount)
+    b = append(b, tmp...)
+    i := length - 1
+    j := len(b) - 1
+    for i >= 0 {
+        if b[i] != ' ' {
+            b[j] = b[i]
+            i--
+            j--
+        } else {
+            b[j] = '0'
+            b[j-1] = '2'
+            b[j-2] = '%'
+            i--
+            j = j - 3
+        }
+    }
+    return string(b)
+}
+```