diff --git a/src/components/GanttComponent.vue b/src/components/GanttComponent.vue
index 9923a81d..587b7f6f 100644
--- a/src/components/GanttComponent.vue
+++ b/src/components/GanttComponent.vue
@@ -62,12 +62,14 @@ export default {
         ];
         gantt.attachEvent('onGanttReady', function () {
             gantt.templates.tooltip_text = function (start, end, task) {
+                let endTime = end.getTime()-24*60*60*1000;
+                let end_date = new Date(endTime);
                 return task.number +
                     '<br/>任务量：' + task.count +
                     '<br/>当日产量：' + task.count_real +
                     '<br/>合格数：' + task.count_ok +
                     '<br/>开工时间：' + gantt.templates.tooltip_date_format(start) +
-                    '<br/>完工时间：' + gantt.templates.tooltip_date_format(start);
+                    '<br/>完工时间：' + gantt.templates.tooltip_date_format(end_date);
             };
         });
         gantt.attachEvent("onTaskClick", async function(id, e) {