diff --git a/randomx.go b/randomx.go
index 17c504a..1db59ef 100644
--- a/randomx.go
+++ b/randomx.go
@@ -7,7 +7,7 @@ import (
 )
 
 // 生成指定位数的随机字符串
-func RandomStr(length int) (string, error) {
+func RandomRune(length int) (string, error) {
 	if length <= 0 {
 		return "", errors.New("位数必须大于0")
 	}
@@ -27,6 +27,27 @@ func RandomStr(length int) (string, error) {
 	return string(result), nil
 }
 
+// 生成指定长度的随机字符串
+func RandomStr(length int) (string, error) {
+	if length <= 0 {
+		return "", errors.New("位数必须大于0")
+	}
+	str := "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
+	bytes := []rune(str)
+
+	// 初始化参数，并赋予空间
+	var result = make([]rune, 0, length)
+
+	// 初始化随机因子
+	r := rand.New(rand.NewSource(time.Now().UnixNano()))
+
+	for i := 0; i < length; i++ {
+		result = append(result, bytes[r.Intn(len(bytes))])
+	}
+
+	return string(result), nil
+}
+
 // 生成指定空间的随机数
 func RandomInt(min, max int) (int, error) {
 	c := max - min