diff --git a/internal/sms/tencent.go b/internal/sms/tencent.go
new file mode 100644
index 0000000..06fcea2
--- /dev/null
+++ b/internal/sms/tencent.go
@@ -0,0 +1,82 @@
+package sms
+
+import (
+	"fmt"
+
+	"github.com/tencentcloud/tencentcloud-sdk-go/tencentcloud/common"
+	"github.com/tencentcloud/tencentcloud-sdk-go/tencentcloud/common/profile"
+	tencentSms "github.com/tencentcloud/tencentcloud-sdk-go/tencentcloud/sms/v20210111"
+
+	"gotest/internal/config"
+)
+
+// TencentSender 腾讯云短信发送器
+type TencentSender struct {
+	secretID   string
+	secretKey  string
+	signName   string
+	templateID string
+	appID      string
+	client     *tencentSms.Client
+}
+
+// NewTencentSender 根据腾讯云短信配置创建发送器实例
+func NewTencentSender(cfg *config.TencentSMS) *TencentSender {
+	return &TencentSender{
+		secretID:   cfg.SecretID,
+		secretKey:  cfg.SecretKey,
+		signName:   cfg.SignName,
+		templateID: cfg.TemplateID,
+		appID:      cfg.AppID,
+	}
+}
+
+// Send 通过腾讯云短信服务发送验证码
+func (s *TencentSender) Send(phone string, code string) error {
+	// 关键配置校验，SecretID/SecretKey 为空时直接返回错误
+	if s.secretID == "" || s.secretKey == "" {
+		return fmt.Errorf("腾讯云短信未配置: SecretID/SecretKey 不能为空")
+	}
+
+	// 懒加载客户端，避免构造时因配置缺失直接 panic
+	if s.client == nil {
+		credential := common.NewCredential(s.secretID, s.secretKey)
+		cpf := profile.NewClientProfile()
+		// 短信服务默认使用 ap-guangzhou 区域
+		client, err := tencentSms.NewClient(credential, "ap-guangzhou", cpf)
+		if err != nil {
+			return fmt.Errorf("创建腾讯云短信客户端失败: %w", err)
+		}
+		s.client = client
+	}
+
+	// 构造发送请求
+	// 腾讯云要求手机号带国家码，默认拼接 +86
+	req := tencentSms.NewSendSmsRequest()
+	req.SmsSdkAppId = common.StringPtr(s.appID)
+	req.SignName = common.StringPtr(s.signName)
+	req.TemplateId = common.StringPtr(s.templateID)
+	req.TemplateParamSet = common.StringPtrs([]string{code})
+	req.PhoneNumberSet = common.StringPtrs([]string{"+86" + phone})
+
+	// 调用腾讯云短信接口发送
+	resp, err := s.client.SendSms(req)
+	if err != nil {
+		return fmt.Errorf("腾讯云短信发送失败: %w", err)
+	}
+
+	// 校验业务返回码，SendStatusSet 中第一条记录的 Code 为 "Ok" 表示发送成功
+	if resp.Response == nil || len(resp.Response.SendStatusSet) == 0 {
+		return fmt.Errorf("腾讯云短信发送失败: 无返回结果")
+	}
+	status := resp.Response.SendStatusSet[0]
+	if status.Code == nil || *status.Code != "Ok" {
+		errMsg := "未知错误"
+		if status.Message != nil {
+			errMsg = *status.Message
+		}
+		return fmt.Errorf("腾讯云短信发送失败: %s", errMsg)
+	}
+
+	return nil
+}