diff --git a/src/platforms/h5/components/system-routes/preview-image/index.vue b/src/platforms/h5/components/system-routes/preview-image/index.vue
index 63307de2fb216fdd7a67c9e805d2c401dfb8910c..7ed12d78caf86ec5456433f9439cc0430e596bf3 100644
--- a/src/platforms/h5/components/system-routes/preview-image/index.vue
+++ b/src/platforms/h5/components/system-routes/preview-image/index.vue
@@ -73,8 +73,9 @@ export default {
   left: 0;
   top: 0;
   width: 100%;
-  height: 100%;
-  background: black;
+  height: 100%;
+  z-index: 999;
+  background: rgba(0,0,0,0.8);
 }
 .uni-system-preview-image-swiper {
   position: absolute;