diff --git a/extend/catcher/library/excel/Excel.php b/extend/catcher/library/excel/Excel.php
index 6174a55..a06823e 100644
--- a/extend/catcher/library/excel/Excel.php
+++ b/extend/catcher/library/excel/Excel.php
@@ -61,25 +61,17 @@ class Excel
      */
     protected function init()
     {
-        if (property_exists($this->excel, 'memory')) {
-            ini_set('memory_limit', $this->excel->memory);
-        }
-
+        $this->setMemoryLimit();
         // register worksheet for current excel
         $this->registerWorksheet();
-
         // before save excel
         $this->before();
-
         // set excel title
         $this->setTitle();
-
         // set excel headers
         $this->setExcelHeaders();
-
         // set cell width
         $this->setSheetWidth();
-
         // set worksheets
         $this->setWorksheets();
     }
diff --git a/extend/catcher/library/excel/MacroExcel.php b/extend/catcher/library/excel/MacroExcel.php
index 9b4a437..a232fdf 100644
--- a/extend/catcher/library/excel/MacroExcel.php
+++ b/extend/catcher/library/excel/MacroExcel.php
@@ -163,4 +163,17 @@ trait MacroExcel
     {
         ++$this->row;
     }
+
+    /**
+     * 设置内存限制
+     *
+     * @time 2020年05月26日
+     * @return void
+     */
+    public function setMemoryLimit()
+    {
+        if (property_exists($this->excel, 'memory')) {
+            ini_set('memory_limit', $this->excel->memory);
+        }
+    }
 }
diff --git a/extend/catcher/library/excel/ShouldTaskContract.php b/extend/catcher/library/excel/ShouldTaskContract.php
new file mode 100644
index 0000000..d3bbf36
--- /dev/null
+++ b/extend/catcher/library/excel/ShouldTaskContract.php
@@ -0,0 +1,7 @@
+<?php
+namespace catcher\library\excel;
+
+interface ShouldTaskContract
+{
+    public function name();
+}
\ No newline at end of file