diff --git a/library/think/Model.php b/library/think/Model.php
index 5a519025..5d162a5d 100644
--- a/library/think/Model.php
+++ b/library/think/Model.php
@@ -163,7 +163,7 @@ abstract class Model implements \JsonSerializable, \ArrayAccess
                 $item[$key] = $data;
             } else {
                 // 模型属性
-                $item[$key] = $this->$key;
+                $item[$key] = $this->__get($key);
             }
         }
         return !empty($item) ? $item : [];