diff --git a/CHANGELOG.md b/CHANGELOG.md
index f691b204..3feb2a5f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,9 @@
 - decimal：增加 `Multiply` 方法
 - env：增加 `GetEnvs` 方法
 - ssh：优化
+- string：优化
+- string：增加 `ToString` 方法
+- string：增加 `Contains` 方法
 
 ## v1.0.39 / 2021-12-27
 
diff --git a/utils/gostring/gostring.go b/utils/gostring/gostring.go
index a53f6c02..b69dc91a 100644
--- a/utils/gostring/gostring.go
+++ b/utils/gostring/gostring.go
@@ -4,11 +4,20 @@ import (
 	"crypto/hmac"
 	"crypto/sha256"
 	"encoding/hex"
+	"fmt"
 	"strconv"
 	"strings"
 	"unicode/utf8"
 )
 
+// ToString 转换成string
+func ToString(value interface{}) string {
+	if value == nil {
+		return ""
+	}
+	return fmt.Sprint(value)
+}
+
 // ToFloat64 string到float64
 func ToFloat64(s string) float64 {
 	i, _ := strconv.ParseFloat(s, 64)
@@ -88,6 +97,11 @@ func Split(s string, sep string) []string {
 	return strings.Split(s, sep)
 }
 
+// Contains 判断字符串是否包含某个字符
+func Contains(s, substr string) bool {
+	return strings.Contains(s, substr)
+}
+
 func NumericalToString(value interface{}) (string, bool) {
 	var val string