diff --git a/source/application/api/controller/library/Pass.php b/source/application/api/controller/library/Pass.php
index 77b27b1..50998ac 100644
--- a/source/application/api/controller/library/Pass.php
+++ b/source/application/api/controller/library/Pass.php
@@ -103,10 +103,12 @@ class Pass extends Controller
             } else {
                 # 查看该组是否存在上一条数据
                 $lastHoursWhere = ['hour_time' => $last_hour, 'group_id' => $val['group_id']];
-                $lastHours = $dm->find('bt_library_hours',$lastHoursWhere);
+                $lastHours = $dm->find('bt_library_hours',$lastHoursWhere,'*','id DESC');
                 if ($lastHours) {
                     $incount = $val['today_incount'] - $lastHours['target_today_incount'];
+                    $incount = $incount > 0 ? $incount : 0;
                     $outcount = $val['today_outcount'] - $lastHours['target_today_outcount'];
+                    $outcount = $outcount > 0 ? $outcount : 0;
                 }
                 # 创建数据
                 $insert = [