diff --git a/src/main/java/com/greenorange/promotion/service/userInfo/impl/UserInfoServiceImpl.java b/src/main/java/com/greenorange/promotion/service/userInfo/impl/UserInfoServiceImpl.java
index d50218d..1687277 100644
--- a/src/main/java/com/greenorange/promotion/service/userInfo/impl/UserInfoServiceImpl.java
+++ b/src/main/java/com/greenorange/promotion/service/userInfo/impl/UserInfoServiceImpl.java
@@ -306,6 +306,12 @@ public class UserInfoServiceImpl extends ServiceImpl<UserInfoMapper, UserInfo>
     public String getVerificationCodeForRegister(String phoneNumber) {
         ThrowUtils.throwIf(RegexUtils.isPhoneInvalid(phoneNumber), ErrorCode.PARAMS_ERROR, "手机号格式错误");
 
+        // 判断手机号是否已注册
+        LambdaQueryWrapper<UserInfo> lambdaQueryWrapper = new LambdaQueryWrapper<>();
+        lambdaQueryWrapper.eq(UserInfo::getPhoneNumber, phoneNumber);
+        UserInfo userInfo = this.getOne(lambdaQueryWrapper);
+        ThrowUtils.throwIf(userInfo != null, ErrorCode.OPERATION_ERROR, "手机号已注册");
+
         String verificationCode = SendSmsUtil.getVerificationCode(phoneNumber);
         ThrowUtils.throwIf(verificationCode == null, ErrorCode.OPERATION_ERROR, "验证码获取失败");
         redisTemplate.opsForValue().set(SystemConstant.VERIFICATION_CODE + ":" + verificationCode, verificationCode, 1, TimeUnit.MINUTES);