diff --git a/library/think/Model.php b/library/think/Model.php
index 4176a12d..2b7f3ae3 100644
--- a/library/think/Model.php
+++ b/library/think/Model.php
@@ -487,11 +487,12 @@ abstract class Model implements \JsonSerializable, \ArrayAccess
      * 设置需要追加的输出属性
      * @access public
      * @param array $append 属性列表
+     * @param bool  $override  是否覆盖
      * @return $this
      */
-    public function append($append = [])
+    public function append($append = [], $override = false)
     {
-        $this->append = $append;
+        $this->append = $override ? $append : array_merge($this->append, $append);
         return $this;
     }
 
@@ -499,22 +500,24 @@ abstract class Model implements \JsonSerializable, \ArrayAccess
      * 设置需要隐藏的输出属性
      * @access public
      * @param array $hidden 属性列表
+     * @param bool  $override  是否覆盖
      * @return $this
      */
-    public function hidden($hidden = [])
+    public function hidden($hidden = [], $override = false)
     {
-        $this->hidden = $hidden;
+        $this->hidden = $override ? $hidden : array_merge($this->hidden, $hidden);
         return $this;
     }
 
     /**
      * 设置需要输出的属性
      * @param array $visible
+     * @param bool  $override  是否覆盖
      * @return $this
      */
-    public function visible($visible = [])
+    public function visible($visible = [], $override = false)
     {
-        $this->visible = $visible;
+        $this->visible = $override ? $visible : array_merge($this->visible, $visible);
         return $this;
     }