diff --git a/module/block/config.php b/module/block/config.php
index 59df2e3825..516595e120 100644
--- a/module/block/config.php
+++ b/module/block/config.php
@@ -309,3 +309,5 @@ $config->block->size['product']['release'] = array('2' => '6', '1' => '6');
 $config->block->size['project']['overview'] = array('1' => '3');
 
 $config->block->size['execution']['overview'] = array('1' => '3');
+
+$config->block->size['qa']['case'] = array('2' => '6', '1' => '6');
diff --git a/module/block/control.php b/module/block/control.php
index a80e5c6e76..cc6f92f572 100755
--- a/module/block/control.php
+++ b/module/block/control.php
@@ -43,8 +43,12 @@ class block extends control
             $formData->account   = $this->app->user->account;
             $formData->vision    = $this->config->vision;
             $formData->params    = json_encode($formData->params);
+
+            if(empty($formData->width))  $formData->width = 1;
             if(!empty($this->config->block->size[$formData->module][$formData->code][$formData->width])) $formData->height = $this->config->block->size[$formData->module][$formData->code][$formData->width];
-            $formData->top       = $this->block->getNewTop($dashboard);
+            if(empty($formData->height)) $formData->height = 3;
+            $formData->left = $formData->width == 2 ? 0 : 2;
+            $formData->top  = $this->block->computeBlockTop($formData);
 
             $this->block->create($formData);
             if(dao::isError()) return $this->send(array('result' => 'fail', 'message' => dao::getError()));
diff --git a/module/block/model.php b/module/block/model.php
index 683494373f..28e29d040a 100644
--- a/module/block/model.php
+++ b/module/block/model.php
@@ -394,14 +394,20 @@ class blockModel extends model
     }
 
     /**
-     * Get new block top.
+     * 计算区块距离顶部的高度。
+     * compute block top height.
      *
-     * @param  string $dashboard
+     * @param  object $block
      * @access public
      * @return int
      */
-    public function getNewTop($dashboard): int
+    public function computeBlockTop(object $block): int
     {
-        return $this->dao->select('max(`top` + `height`) AS top')->from(TABLE_BLOCK)->where('dashboard')->eq($dashboard)->andWhere('hidden')->eq('0')->fetch('top');
+        return $this->dao->select('max(`top` + `height`) AS top')->from(TABLE_BLOCK)
+            ->where('dashboard')->eq($block->dashboard)
+            ->andWhere('width')->eq($block->width)
+            ->andWhere('vision')->eq($block->vision)
+            ->andWhere('hidden')->eq('0')
+            ->fetch('top');
     }
 }
diff --git a/module/block/tao.php b/module/block/tao.php
index d11d01d5c7..c90c0180cc 100644
--- a/module/block/tao.php
+++ b/module/block/tao.php
@@ -18,6 +18,7 @@ class blockTao extends blockModel
             ->andWhere('dashboard')->eq($dashboard)
             ->andWhere('hidden')->eq($hidden)
             ->andWhere('vision')->eq($this->config->vision)
+            ->orderBy('width_desc,top_asc')
             ->fetchAll();
     }
 
diff --git a/module/block/zen.php b/module/block/zen.php
index b48dc882e8..e2ce32e4e8 100644
--- a/module/block/zen.php
+++ b/module/block/zen.php
@@ -176,6 +176,23 @@ class blockZen extends block
             /* 生成更多链接。 */
             $this->createMoreLink($block, $projectID);
         }
+
+        $blocks = array_values($blocks);
+        $height = array(1 => 0, 2 => 0);
+        foreach($blocks as $block)
+        {
+            if($block->width == 3)
+            {
+                $block->top = max($height[0], $height[1]);
+                $height[0] += $block->height;
+                $height[1] += $block->height;
+            }
+            else
+            {
+                $block->top = $height[$block->width];
+                $height[$block->width] += $block->height;
+            }
+        }
         return $blocks;
     }