diff --git a/app/adminapi/logic/animal_info/AnimalInfoLogic.php b/app/adminapi/logic/animal_info/AnimalInfoLogic.php
index d10b9c1..ffb3506 100644
--- a/app/adminapi/logic/animal_info/AnimalInfoLogic.php
+++ b/app/adminapi/logic/animal_info/AnimalInfoLogic.php
@@ -38,6 +38,11 @@ class AnimalInfoLogic extends BaseLogic
      */
     public static function add(array $params): bool
     {
+        $repeat = AnimalInfo::where('sn', $params['sn'])->count();
+        if ($repeat > 0) {
+            self::setError('耳号已使用');
+            return false;
+        }
         Db::startTrans();
         try {
             AnimalInfo::create([