diff --git a/collection/uni-media-library/schema.ext.js b/collection/uni-media-library/schema.ext.js
index 8905fe7..4fa3194 100644
--- a/collection/uni-media-library/schema.ext.js
+++ b/collection/uni-media-library/schema.ext.js
@@ -32,10 +32,11 @@ function getOssProcessUrls (url) {
   if (!url) return urls
 
   const cropRules = getImageCropRule(url)
+  const cropMediaAssetsConfig = config.cropMediaAssets || false
 
   for (const key in cropRules) {
     // webp 格式不支持缩略图
-    if (/.webp/.test(url) || !config.cropMediaAssets) {
+    if (/.webp/.test(url) || !cropMediaAssetsConfig) {
       urls[key] = url
     } else {
       urls[key] = url + cropRules[key]