diff --git a/apps/backend/src/sms/sms.service.ts b/apps/backend/src/sms/sms.service.ts
index 5333979..95111e3 100644
--- a/apps/backend/src/sms/sms.service.ts
+++ b/apps/backend/src/sms/sms.service.ts
@@ -129,7 +129,6 @@ export class SmsService {
                     phone,
                     type,
                     expiredAt: MoreThan(now),
-                    usedAt: null,
                 },
                 order: { createdAt: 'DESC' },
             });
@@ -141,6 +140,14 @@ export class SmsService {
                 })
             }
 
+            // 检查被用过没
+            if (record.usedAt !== null) {
+                throw new BusinessException({
+                    code: ErrorCode.SMS_CODE_EXPIRED,
+                    message: '验证码已失效，请重新获取',
+                })
+            }
+
             // 检查尝试次数
             if (record.tryCount >= LoginSmsMaxTryCount) {
                 throw new BusinessException({