diff --git a/conf/app.php b/conf/app.php
index 774008a..b63c895 100644
--- a/conf/app.php
+++ b/conf/app.php
@@ -53,6 +53,7 @@ $configs = array(
     'supportedVideoExts' => array('mp4', 'mov', 'm3u8'),
     'screenshot_start' => 1000,     //视频播放页快照截取开始时间，单位：毫秒
     'screenshot_expire_seconds' => 315360000,   //视频封面图缓存3650天
+    'enableSmallImage' => true,     //开启图片小尺寸缩略图
 
     /*
     //视频皮肤配置
diff --git a/themes/beauty/controller/SiteController.php b/themes/beauty/controller/SiteController.php
index 9ab31a5..5b4a2a8 100644
--- a/themes/beauty/controller/SiteController.php
+++ b/themes/beauty/controller/SiteController.php
@@ -266,6 +266,7 @@ Class SiteController extends Controller {
     }
 
     //优先从缓存获取小尺寸的图片
+    //增加父目录封面图缓存更新
     public function actionSmallimg() {
         $imgId = $this->get('id', '');
         $imgUrl = $this->get('url', '');
@@ -297,12 +298,20 @@ Class SiteController extends Controller {
         $code = 0;
         $msg = 'OK';
 
+        $cateId = $this->post('pid', '');
         $imgId = $this->post('id', '');
         $imgData = $this->post('data', '');     //base64格式的图片数据
         if (empty($imgId) || empty($imgData)) {
             $code = 0;
             $msg = '参数不能为空';
         }else {
+            //如果是目录封面图生成缩略图，则更新目录封面图缓存数据
+            if (!empty($cateId)) {
+                $cacheKey = $this->getCacheKey($cateId, 'dirsnap');
+                $img_id = '';   //为保持数据格式一致，图片id传空
+                Common::saveCacheToFile($cacheKey, array('url' => $imgData, 'img_id' => $img_id));
+            }
+
             $cacheKey = $this->getCacheKey($imgId, 'imgsm');
             $cacheSubDir = 'image';
             $saved = Common::saveCacheToFile($cacheKey, $imgData, $cacheSubDir);
diff --git a/themes/beauty/views/layout/main.php b/themes/beauty/views/layout/main.php
index 1ea65bc..95c8f1c 100644
--- a/themes/beauty/views/layout/main.php
+++ b/themes/beauty/views/layout/main.php
@@ -101,6 +101,13 @@ require_once __DIR__ . '/../../../../plugins/Html.php';
     <script src="/js/qrcode.min.js"></script>
     <script src="/js/video.min.js"></script>
     <script src="/js/beauty.js?v<?= Html::getStaticFileVersion('beauty.js', 'js') ?>"></script>
+    <script>
+        <?php if (FSC::$app['config']['enableSmallImage'] == false) {
+            echo <<<eof
+var disableSmallImage = true;
+eof;
+        } ?>
+    </script>
     <?php echo Html::getGACode(); ?>
 </body>
 </html>
\ No newline at end of file
diff --git a/www/js/beauty.js b/www/js/beauty.js
index 8754e95..888699a 100644
--- a/www/js/beauty.js
+++ b/www/js/beauty.js
@@ -21,18 +21,20 @@ if ($('#image_site').get(0)) {
     })
 
     //需要浏览器支持naturalWidth
-    var saveSmallImg = function(imgEl) {
+    var saveSmallImg = function(imgEl, cateId) {
         var width = imgEl.width,
             naturalWidth = imgEl.naturalWidth,
             naturalHeight = imgEl.naturalHeight;
-        if (!naturalWidth || naturalWidth - width < 100) {return false;}
+        if (!naturalWidth || naturalWidth - width < 100 ||
+            (typeof(disableSmallImage) != 'undefined' && disableSmallImage)
+        ) {
+            return false;
+        }
 
         var aspect = naturalHeight / naturalWidth;
-
         var canvas = document.createElement('canvas');
-
-        canvas.width = width;
-        canvas.height = width * aspect;
+        canvas.width = width * 1.5;
+        canvas.height = canvas.width * aspect;
 
         var ctx = canvas.getContext('2d');
         ctx.drawImage( imgEl, 0, 0, canvas.width, canvas.height );
@@ -45,6 +47,9 @@ if ($('#image_site').get(0)) {
                     id: $(imgEl).attr('data-id'),
                     data: smallImg
                 };
+            if (typeof(cateId) != 'undefined' && cateId) {
+                params.pid = cateId;
+            }
 
             $.ajax({
                 url: '/site/savesmallimg',
@@ -218,7 +223,7 @@ $('.dir_item').each(function(index, el) {
                     setTimeout(function() {
                         var imgs = $(el).find('.im_img');
                         if (imgs.length > 0) {
-                            saveSmallImg(imgs[0]);
+                            saveSmallImg(imgs[0], id);
                         }
                     }, 100);
                 }