diff --git a/making_school_asignment_app/lib/common/utils/utils.dart b/making_school_asignment_app/lib/common/utils/utils.dart
index 4a040a9..fd50d73 100644
--- a/making_school_asignment_app/lib/common/utils/utils.dart
+++ b/making_school_asignment_app/lib/common/utils/utils.dart
@@ -239,8 +239,10 @@ class Utils {
         }
       }
       secList.sort();
-      var maxSec = secList.isNotEmpty ? secList.last : 0;
-      var minSec = secList.isNotEmpty ? secList.first : 0;
+     /* var maxSec = secList.isNotEmpty ? secList.last : 0;
+      var minSec = secList.isNotEmpty ? secList.first : 0;*/
+      var maxSec = secList.isNotEmpty ? secList.reduce((value, element) => value > element ? value : element):0;
+      var minSec = secList.isNotEmpty ? secList.reduce((value, element) => value < element ? value : element):0;
       var secTime = secList.isNotEmpty ? maxSec - minSec : 0;
       stu.ttlSec = second2HMS(secTime);
     }
diff --git a/making_school_asignment_app/lib/page/home_page/children/job_report/widget/personnel_data_overview.dart b/making_school_asignment_app/lib/page/home_page/children/job_report/widget/personnel_data_overview.dart
index 41f633a..46c61a2 100644
--- a/making_school_asignment_app/lib/page/home_page/children/job_report/widget/personnel_data_overview.dart
+++ b/making_school_asignment_app/lib/page/home_page/children/job_report/widget/personnel_data_overview.dart
@@ -26,17 +26,21 @@ class _PersonnelDataOverviewState extends State<PersonnelDataOverview> {
 
     for (var i = 0; i < widget.studentList.length; i++) {
       var student = widget.studentList[i];
-      TimeUnits timeUnits = convertMilliseconds(student.useTime!);
+    /*TimeUnits timeUnits = convertMilliseconds(student.useTime!);
       String timeerStr = '';
       if (timeUnits.hours > 0) timeerStr = '${timeUnits.hours}:';
       if (timeUnits.minutes > 0) timeerStr += '${timeUnits.minutes}:';
-      timeerStr += timeUnits.seconds.toString();
+      timeerStr += timeUnits.seconds.toString();*/
 
       names.add(student.studentName);
-      useTimes.add(timeerStr);
+      // useTimes.add(timeerStr);
+      useTimes.add(student.ttlSec!);
+
       correctRates.add('${student.okRate!.toStringAsFixed(0)}%');
       noAnswerCounts.add(student.noAnswerCount.toString());
       rankings.add('${i + 1}名');
+
+
     }
     mapData = {
       '姓名': names,