diff --git a/app/user/cmd/api/internal/logic/user/bindmobilelogic.go b/app/user/cmd/api/internal/logic/user/bindmobilelogic.go
index 657d393..aca9a50 100644
--- a/app/user/cmd/api/internal/logic/user/bindmobilelogic.go
+++ b/app/user/cmd/api/internal/logic/user/bindmobilelogic.go
@@ -42,6 +42,13 @@ func (l *BindMobileLogic) BindMobile(req *types.BindMobileReq) (resp *types.Bind
 	if err != nil {
 		return nil, errors.Wrapf(xerr.NewErrCode(xerr.SERVER_COMMON_ERROR), "绑定手机号, 加密手机号失败: %v", err)
 	}
+	user, err := l.svcCtx.UserModel.FindOneByMobile(l.ctx, sql.NullString{String: encryptedMobile, Valid: true})
+	if err != nil && !errors.Is(err, model.ErrNotFound) {
+		return nil, errors.Wrapf(xerr.NewErrCode(xerr.DB_ERROR), "绑定手机号, %v", err)
+	}
+	if user != nil {
+		return nil, errors.Wrapf(xerr.NewErrMsg("该手机号已绑定"), "绑定手机号, %v", err)
+	}
 	// 检查手机号是否在一分钟内已发送过验证码
 	redisKey := fmt.Sprintf("%s:%s", "bindMobile", encryptedMobile)
 	cacheCode, err := l.svcCtx.Redis.Get(redisKey)