diff --git a/stringutil/replace.go b/stringutil/replace.go
new file mode 100644
index 0000000..5047b5f
--- /dev/null
+++ b/stringutil/replace.go
@@ -0,0 +1,20 @@
+package stringutil
+
+import (
+	"fmt"
+	"regexp"
+)
+
+// ReplaceJSONField 使用正则表达式替换 JSON 字符串中指定字段的值
+// fieldNames: 要替换的多个字段名，使用竖线(|)分隔（例如："tenantId|tenant_id"）
+// newValue: 新的值（字符串形式，将被包装在引号中）
+// jsonStr: 原始 JSON 字符串
+func ReplaceJSONField(fieldNames, newValue, jsonStr string) string {
+	// 构建正则表达式模式
+	// 匹配模式: ("field1"|"field2"|...): "任意值"
+	pattern := fmt.Sprintf(`(?i)("(%s)")\s*:\s*"([^"]*)"`, fieldNames)
+	re := regexp.MustCompile(pattern)
+
+	// 替换匹配到的内容
+	return re.ReplaceAllString(jsonStr, fmt.Sprintf(`${1}: "%s"`, newValue))
+}
diff --git a/stringutil/replace_test.go b/stringutil/replace_test.go
new file mode 100644
index 0000000..bcbb310
--- /dev/null
+++ b/stringutil/replace_test.go
@@ -0,0 +1,38 @@
+package stringutil
+
+import (
+	"github.com/stretchr/testify/assert"
+	"testing"
+)
+
+func TestReplaceJSONField(t *testing.T) {
+	// 测试替换单个字段
+	jsonStr := `{"tenantId": "123", "name": "test"}`
+	result := ReplaceJSONField("tenantId", "456", jsonStr)
+	expected := `{"tenantId": "456", "name": "test"}`
+	assert.Equal(t, expected, result)
+
+	// 测试替换多个字段
+	jsonStr = `{"tenantId": "123", "tenant_id": "789", "name": "test"}`
+	result = ReplaceJSONField("tenantId|tenant_id", "456", jsonStr)
+	expected = `{"tenantId": "456", "tenant_id": "456", "name": "test"}`
+	assert.Equal(t, expected, result)
+
+	// 测试字段不存在
+	jsonStr = `{"name": "test"}`
+	result = ReplaceJSONField("tenantId", "456", jsonStr)
+	expected = `{"name": "test"}`
+	assert.Equal(t, expected, result)
+
+	// 测试空 JSON 字符串
+	jsonStr = ``
+	result = ReplaceJSONField("tenantId", "456", jsonStr)
+	expected = ``
+	assert.Equal(t, expected, result)
+
+	// 测试空字段名
+	jsonStr = `{"tenantId": "123"}`
+	result = ReplaceJSONField("", "456", jsonStr)
+	expected = `{"tenantId": "123"}`
+	assert.Equal(t, expected, result)
+}
diff --git a/tag.bat b/tag.bat
index f936e2d..a3e8135 100644
--- a/tag.bat
+++ b/tag.bat
@@ -1,4 +1,4 @@
-git tag v1.1.20
+git tag v1.1.21
 
 git tag bank_card/v1.1.5
 git tag geoip/v1.1.5