diff --git a/jeecg-boot/jeecg-boot-module-system/src/main/java/org/jeecg/modules/task/controller/TaskController.java b/jeecg-boot/jeecg-boot-module-system/src/main/java/org/jeecg/modules/task/controller/TaskController.java
index f378790..6e8d9bf 100644
--- a/jeecg-boot/jeecg-boot-module-system/src/main/java/org/jeecg/modules/task/controller/TaskController.java
+++ b/jeecg-boot/jeecg-boot-module-system/src/main/java/org/jeecg/modules/task/controller/TaskController.java
@@ -400,8 +400,9 @@ public class TaskController extends JeecgController<Task, ITaskService> {
         workTime += (millisecond / DAYTIME) * DAYWORKTIME;
         millisecond = millisecond % DAYTIME;
 
-        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy/MM/dd");
+
         SimpleDateFormat sdf1 = new SimpleDateFormat("HH:mm:ss");
+        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy/MM/dd");
         SimpleDateFormat sdf = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
         String time = dateFormat.format(new Date());
         String start = sdf1.format(startTime);
@@ -481,6 +482,84 @@ public class TaskController extends JeecgController<Task, ITaskService> {
         }
     }
 
+    /**
+     * 计算预计结束时间
+     * @param task
+     * @return
+     */
+    @GetMapping("/estimateTime")
+    public Result<?> calculating(Task task){
+        if (task.getStartTime() == null || task.getExpectedDuration() == null)
+            return Result.error("参数不足，无法计算预计结束时间");
+        Date date = null;
+        try {
+            date = estimateTime(task.getStartTime(), task.getExpectedDuration());
+        } catch (ParseException e) {
+            throw new RuntimeException(e);
+        }
+        return Result.OK(date);
+    }
+
+    /**
+     * 计算预计结束时间方法
+     * @param startTime
+     * @param expectedDuration
+     * @return
+     */
+    private Date estimateTime(Date startTime, Double expectedDuration) throws ParseException {
+        long millisecond = (long) (expectedDuration * 60 * 60 * 1000);
+        //整天偏移量
+        int offset = (int) (millisecond / DAYWORKTIME);
+        //剩余工作量
+        millisecond = millisecond % DAYWORKTIME;
+
+
+        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy/MM/dd");
+        SimpleDateFormat sdf = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
+
+        String time = dateFormat.format(startTime);
+        String time1 = time + MORINGSTART;
+        String time2 = time + MORINGEND;
+        String time3 = time + AFTERNOONSTART;
+        String time4 = time + AFTERNOONEND;
+        Date date3 = sdf.parse(time3);
+        Date date2 = sdf.parse(time2);
+        Date date1 = sdf.parse(time1);
+        Date date4 = sdf.parse(time4);
+
+        long tempTime = 0;
+        if (startTime.compareTo(date1) <= 0)
+            startTime = date1;  //任务发布在8点半之前，修正时间
+        if (startTime.compareTo(date2) < 0){
+            //上午发布任务
+            tempTime = date2.getTime() - startTime.getTime();
+            if (tempTime >= millisecond)
+                return new Date(startTime.getTime() + millisecond + DAYTIME*offset); //预计上午结束,直接偏移剩余时间
+            //上午剩余时间全部工作，时间进行修正到下午工作开始时间
+            millisecond -= tempTime;
+            startTime = date3;
+        }
+
+        if (startTime.compareTo(date3) <= 0)
+            startTime = date3;  //任务是下午发布且在2点半之前，修正时间
+        if (startTime.compareTo(date4) < 0){
+            //下午发布任务
+            tempTime = date4.getTime() - startTime.getTime();
+            if (tempTime >= millisecond)
+                return new Date(startTime.getTime() + millisecond + DAYTIME*offset);
+        }
+        //时间修正，天数偏移量加1，到这里有两中情况，1、白天工作时间不足抵消 2、下午6点之后发布任务
+        offset ++;
+        startTime = date1;
+
+        tempTime = date2.getTime() - date1.getTime();
+        if (tempTime >= millisecond)
+            return new Date(startTime.getTime() + millisecond + DAYTIME*offset);
+        //上午偏移不足，下午一定够，因为不会跨两天
+        millisecond -= tempTime;
+        return new Date(startTime.getTime() + millisecond + DAYTIME*offset);
+    }
+
     /**
      * 通过id删除
      *