diff --git a/app/api/controller/Maintainentry.php b/app/api/controller/Maintainentry.php
index ad2cd74..b0b9584 100644
--- a/app/api/controller/Maintainentry.php
+++ b/app/api/controller/Maintainentry.php
@@ -754,12 +754,17 @@ class Maintainentry extends BaseController
 //                            }
             }
         }
+        $waste_land_area = 0;
 
-        $waste_land_area = $post['land_area'] - $mianji - $post['breed_area'];
-        if($waste_land_area < 0){
-            $waste_land_area = 0;
+        if (!empty($post['land_area']) && !empty($post['breed_area']))
+        {
+            $waste_land_area = $post['land_area'] - $mianji - $post['breed_area'];
+            if($waste_land_area < 0){
+                $waste_land_area = 0;
+            }
         }
 
+
         if ($find) {
             //        修改人员信息
             $data['tools_msg']      = $post['tools_msg'];