diff --git a/backend/models/User.php b/backend/models/User.php
index 7c9edff6..4fc4e37a 100644
--- a/backend/models/User.php
+++ b/backend/models/User.php
@@ -13,6 +13,7 @@
 use common\helpers\Util;
 use yii\base\Event;
 use yii\web\ForbiddenHttpException;
+use yii\web\UploadedFile;
 
 /**
  * User model
@@ -23,6 +24,7 @@
  * @property string $password_reset_token
  * @property string $email
  * @property string $auth_key
+ * @property string $avatar
  * @property integer $status
  * @property integer $created_at
  * @property integer $updated_at
@@ -96,6 +98,14 @@ public function attributeLabels()
         ];
     }
 
+    public function beforeValidate()
+    {
+        if($this->avatar !== "0") {//为0表示需要删除图片，Util::handleModelSingleFileUpload()会有判断删除图片
+            $this->avatar = UploadedFile::getInstance($this, "avatar");
+        }
+        return parent::beforeValidate();
+    }
+
     public function beforeSave($insert)
     {
         Util::handleModelSingleFileUpload($this, 'avatar', $insert, '@admin/uploads/avatar/');
diff --git a/common/models/Article.php b/common/models/Article.php
index bbf3bd4f..45852d6e 100644
--- a/common/models/Article.php
+++ b/common/models/Article.php
@@ -15,6 +15,7 @@
 use Yii;
 use common\libs\Constants;
 use yii\behaviors\TimestampBehavior;
+use yii\web\UploadedFile;
 
 /**
  * This is the model class for table "{{%article}}".
@@ -109,7 +110,6 @@ public function rules()
                     'title',
                     'sub_title',
                     'summary',
-                    'thumb',
                     'seo_title',
                     'seo_keywords',
                     'seo_description',
@@ -295,6 +295,14 @@ public function afterFind()
         parent::afterFind();
     }
 
+    public function beforeValidate()
+    {
+        if ($this->thumb !== "0") {//为0表示需要删除图片，Util::handleModelSingleFileUpload()会有判断删除图片
+            $this->thumb = UploadedFile::getInstance($this, "thumb");
+        }
+        return parent::beforeValidate();
+    }
+
     public function beforeSave($insert)
     {
         if ($this->thumb) {