diff --git a/module/product/model.php b/module/product/model.php
index c608c47c7d..8db06d4e6c 100755
--- a/module/product/model.php
+++ b/module/product/model.php
@@ -1517,7 +1517,7 @@ class productModel extends model
             }
         }
 
-        $casesCount = $this->productTao->getStoriesInCasesCount($storyIdList);
+        $casesCount = $this->productTao->getStoryCasesCount($storyIdList);
         $rate  = count($stories) == 0 || $rateCount == 0 ? 0 : round($casesCount / $rateCount, 2);
 
         $storyCommon = $this->lang->SRCommon;
diff --git a/module/product/tao.php b/module/product/tao.php
index 9bfeb1a4e7..c1ea41b61a 100644
--- a/module/product/tao.php
+++ b/module/product/tao.php
@@ -637,13 +637,11 @@ class productTao extends productModel
      * @access protected
      * @return int
      */
-    protected function getStoriesInCasesCount(array $storyIdList): int
+    protected function getStoryCasesCount(array $storyIdList): int
     {
         if(empty($storyIdList)) return 0;
 
-        $cases = $this->dao->select('story')->from(TABLE_CASE)->where('story')->in($storyIdList)->andWhere('deleted')->eq(0)->fetchAll('story');
-
-        return count($cases);
+        return $this->dao->select('COUNT(story) AS count')->from(TABLE_CASE)->where('story')->in($storyIdList)->andWhere('deleted')->eq('0')->fetch('count');
     }
 
     /**