diff --git a/module/project/css/task.css b/module/project/css/task.css
index 050b253d51..92018e1102 100644
--- a/module/project/css/task.css
+++ b/module/project/css/task.css
@@ -24,4 +24,7 @@
 .pl-5px{padding-left:5px;}
 
 tbody > tr > td > .btn-icon {margin-right: 2px}
-.table-children td{background-color:#fff0f5!important;}
\ No newline at end of file
+.table-children{border-left:2px solid #ccc;border-right:2px solid #ccc;}
+.table-children.table-child-top{border-top:2px solid #ccc;}
+.table-children.table-child-bottom{border-bottom:2px solid #ccc;}
+.table-children td{background-color:#f0f8ff!important;}
diff --git a/module/project/view/task.html.php b/module/project/view/task.html.php
index 311b74f614..db7f63aea1 100644
--- a/module/project/view/task.html.php
+++ b/module/project/view/task.html.php
@@ -70,13 +70,18 @@ js::set('browseType', $browseType);
         <tr class='text-center' data-id='<?php echo $task->id?>'>
           <?php foreach ($setting as $key => $value) $this->task->printCell($value, $task, $users, $browseType, $branchGroups, $modulePairs, $useDatatable ? 'datatable' : 'table');?>
         </tr>
-          <?php if(!empty($task->children)):?>
-            <?php foreach($task->children as $child):?>
-            <tr class='text-center table-children parent-<?php echo $task->id;?>' data-id='<?php echo $child->id?>'>
+          <?php
+            if(!empty($task->children))
+            {
+              $childrenNum = count($task->children);
+              foreach($task->children as $key=>$child)
+              {
+          ?>
+            <tr class='text-center table-children<?php if($key==0) echo ' table-child-top';?><?php if(($key+1) == $childrenNum) echo ' table-child-bottom';?> parent-<?php echo $task->id;?>' data-id='<?php echo $child->id?>'>
               <?php foreach ($setting as $key => $value) $this->task->printCell($value, $child, $users, $browseType, $branchGroups, $modulePairs, $useDatatable ? 'datatable' : 'table');?>
             </tr>
-            <?php endforeach;?>
-          <?php endif;?>
+            <?php }?>
+          <?php }?>
         <?php endforeach;?>
       </tbody>
       <tfoot>