diff --git a/app/Endpoint/Api/Http/Controllers/Auth/RegisterController.php b/app/Endpoint/Api/Http/Controllers/Auth/RegisterController.php
index 2f088fc0..fd9e8fc2 100644
--- a/app/Endpoint/Api/Http/Controllers/Auth/RegisterController.php
+++ b/app/Endpoint/Api/Http/Controllers/Auth/RegisterController.php
@@ -6,10 +6,11 @@ use App\Constants\Device;
 use App\Endpoint\Api\Http\Controllers\Controller;
 use App\Endpoint\Api\Http\Requests\RegisterRequest;
 use App\Exceptions\BizException;
+use App\Helpers\PhoneNumber;
 use App\Models\SmsCode;
 use App\Models\User;
-use App\Models\UserInfo;
 use App\Services\SmsCodeService;
+use Illuminate\Support\Arr;
 use Illuminate\Support\Facades\DB;
 use Throwable;
 
@@ -32,17 +33,9 @@ class RegisterController extends Controller
             $input['verify_code']
         );
 
-        $inviter = null;
-
-        if (
-            $request->filled('code') &&
-            is_null($inviter = UserInfo::where('code', $input['code'])->first())
-        ) {
-            throw new BizException(__('Invalid invitation code'));
-        }
-
         $time = now();
         $ip = $request->realIp();
+        $inviter = $this->findUserByCode((string) Arr::get($input, 'code'));
 
         try {
             DB::beginTransaction();
@@ -70,4 +63,31 @@ class RegisterController extends Controller
             $user->createDeviceToken(Device::UNIAPP)
         );
     }
+
+    /**
+     * 通过邀请码搜索用户
+     *
+     * @param string $code
+     * @return \App\Models\User|null
+     *
+     * @throws \App\Exceptions\BizException
+     */
+    protected function findUserByCode(string $code): ?User
+    {
+        if ($code === '') {
+            return null;
+        }
+
+        $user = User::when(PhoneNumber::validate($code), function ($query) use ($code) {
+            $query->where('phone', $code);
+        }, function ($query) use ($code) {
+            $query->whereRelation('userInfo', 'code', $code);
+        })->first();
+
+        if ($user === null) {
+            throw new BizException(__('Inviter does not exist'));
+        }
+
+        return $user;
+    }
 }
diff --git a/app/Helpers/PhoneNumber.php b/app/Helpers/PhoneNumber.php
new file mode 100644
index 00000000..f9429f41
--- /dev/null
+++ b/app/Helpers/PhoneNumber.php
@@ -0,0 +1,17 @@
+<?php
+
+namespace App\Helpers;
+
+class PhoneNumber
+{
+    /**
+     * 确认参数是否是一个有效的手机号
+     *
+     * @param string $var
+     * @return bool
+     */
+    public static function validate(string $var): bool
+    {
+        return (bool) preg_match('/^1[3-9]\d{9}$/', $var);
+    }
+}
diff --git a/app/Rules/PhoneNumber.php b/app/Rules/PhoneNumber.php
index 0dea808a..f8302351 100644
--- a/app/Rules/PhoneNumber.php
+++ b/app/Rules/PhoneNumber.php
@@ -2,6 +2,7 @@
 
 namespace App\Rules;
 
+use App\Helpers\PhoneNumber as PhoneNumberHelper;
 use Illuminate\Contracts\Validation\Rule;
 
 class PhoneNumber implements Rule
@@ -15,7 +16,7 @@ class PhoneNumber implements Rule
      */
     public function passes($attribute, $value): bool
     {
-        return (bool) preg_match('/^1[3-9]\d{9}$/', $value);
+        return PhoneNumberHelper::validate($value);
     }
 
     /**
diff --git a/resources/lang/zh_CN.json b/resources/lang/zh_CN.json
index b94fae46..fe4fe247 100644
--- a/resources/lang/zh_CN.json
+++ b/resources/lang/zh_CN.json
@@ -2,9 +2,9 @@
     ":resource not found": ":resource 未找到",
     "Incorrect account or password": "账户或密码错误",
     "Invalid captcha": "无效的验证码",
-    "Invalid invitation code": "无效的邀请码",
     "Invalid verification code": "无效的验证码",
     "Invalid verification code type": "无效的验证码类型",
+    "Inviter does not exist": "邀请人不存在",
     "Registration failed, please try again": "注册失败，请重试",
     "Sending too frequently, please try again later": "发送过于频繁，请稍后再试",
     "The phone number is already registered": "手机号码已被注册",