diff --git a/module/programplan/config/form.php b/module/programplan/config/form.php
index 6a82bfec6c..514387b34f 100644
--- a/module/programplan/config/form.php
+++ b/module/programplan/config/form.php
@@ -54,3 +54,6 @@ $config->programplan->form->updateDateByGantt['id']        = array('required' =>
 $config->programplan->form->updateDateByGantt['startDate'] = array('required' => false, 'type' => 'string', 'default' => null);
 $config->programplan->form->updateDateByGantt['endDate']   = array('required' => false, 'type' => 'string', 'default' => '');
 $config->programplan->form->updateDateByGantt['type']      = array('required' => false, 'type' => 'string', 'default' => '');
+
+$config->programplan->form->updateTaskOrderByGantt['id']    = array('required' => false, 'type' => 'string', 'default' => '');
+$config->programplan->form->updateTaskOrderByGantt['tasks'] = array('required' => false, 'type' => 'array',  'default' => array());
diff --git a/module/programplan/control.php b/module/programplan/control.php
index 39417ec850..0ae0dccf3d 100644
--- a/module/programplan/control.php
+++ b/module/programplan/control.php
@@ -227,7 +227,8 @@ class programplan extends control
         $taskID = !empty($idList[1]) ? $idList[1] : 0;
         if(empty($taskID)) return $this->send(array('result' => 'fail', 'message' => ''));
 
-        $this->loadModel('task')->updateOrderByGantt();
+        $postData = form::data($this->config->programplan->form->updateTaskOrderByGantt)->get();
+        $this->loadModel('task')->updateOrderByGantt($postData);
         if(dao::isError()) return $this->send(array('result' => 'fail', 'message' => dao::getError()));
 
         $this->loadModel('action')->create('task', $taskID, 'ganttMove');
diff --git a/module/task/model.php b/module/task/model.php
index 952f18b71d..2403699a94 100755
--- a/module/task/model.php
+++ b/module/task/model.php
@@ -2645,23 +2645,24 @@ class taskModel extends model
     }
 
     /**
+     * 拖动甘特图更新任务的顺序。
      * Update order by gantt.
      *
+     * @param  object $postData
      * @access public
-     * @return void
+     * @return bool
      */
-    public function updateOrderByGantt()
+    public function updateOrderByGantt(object $postData): bool
     {
-        $data = fixer::input('post')->get();
-
         $order = 1;
-        foreach($data->tasks as $task)
+        foreach($postData->tasks as $task)
         {
             $idList = explode('-', $task);
             $taskID = $idList[1];
             $this->dao->update(TABLE_TASK)->set('`order`')->eq($order)->where('id')->eq($taskID)->exec();
             $order ++;
         }
+        return !dao::isError();
     }
 
     /**
diff --git a/module/task/test/model/updateorderbygantt.php b/module/task/test/model/updateorderbygantt.php
new file mode 100644
index 0000000000..c2cefbdcb3
--- /dev/null
+++ b/module/task/test/model/updateorderbygantt.php
@@ -0,0 +1,25 @@
+#!/usr/bin/env php
+<?php
+include dirname(__FILE__, 5) . '/test/lib/init.php';
+include dirname(__FILE__, 2) . '/task.class.php';
+su('admin');
+
+zdTable('task')->config('task', true)->gen(30);
+
+/**
+
+title=taskModel->updateOrderByGantt();
+timeout=0
+cid=1
+
+*/
+
+$taskIdList[0] = array(1, 2, 3, 4, 5);
+$taskIdList[1] = array(2, 3, 1, 4, 5);
+$taskIdList[2] = array(4, 2, 3, 1, 5);
+
+$taskTester = new taskTest();
+
+r($taskTester->updateOrderByGanttTest(3, 1, $taskIdList[0])) && p() && e('1,2,3,4,5'); // 测试更新开发任务11的顺序
+r($taskTester->updateOrderByGanttTest(3, 1, $taskIdList[1])) && p() && e('3,1,2,4,5'); // 测试更新开发任务11的顺序
+r($taskTester->updateOrderByGanttTest(3, 4, $taskIdList[2])) && p() && e('4,2,3,1,5'); // 测试更新开发任务14的顺序
diff --git a/module/task/test/task.class.php b/module/task/test/task.class.php
index b7cb05a05f..ec827bf7b7 100755
--- a/module/task/test/task.class.php
+++ b/module/task/test/task.class.php
@@ -2147,4 +2147,25 @@ class taskTest
         if(dao::isError()) return dao::getError();
         return true;
     }
+
+    /**
+     * 拖动甘特图更新任务的顺序。
+     * Update order by gantt.
+     *
+     * @param  int    $executionID
+     * @param  int    $taskID
+     * @param  array  $taskIdList
+     * @access public
+     * @return string
+     */
+    public function updateOrderByGanttTest(int $executionID, int $taskID, array $taskIdList): string
+    {
+        $postData = new stdclass();
+        $postData->id = "{$executionID}-{$taskID}";
+
+        foreach($taskIdList as $id) $postData->tasks[] = "{$executionID}-{$id}";
+
+        $this->objectModel->updateOrderByGantt($postData);
+        return $this->objectModel->dao->select('GROUP_CONCAT(`order`) as taskOrder')->from(TABLE_TASK)->where('id')->in($taskIdList)->fetch('taskOrder');
+    }
 }