diff --git a/src/common/preview/index.js b/src/common/preview/index.js
index 0fba21c5f..90c5be3f9 100644
--- a/src/common/preview/index.js
+++ b/src/common/preview/index.js
@@ -29,6 +29,10 @@ async function preview (attId, type) {
   }
   const res = await getBusStandFileByAttId({ attId })
   if (res.ok && res.data) {
+    let viewer = '/static/pdf/web/viewer.html?file='
+    if (isMobile()) {
+      viewer = '/static/pdf_old/web/viewer.html?file='
+    }
     const file = res.data
     let url = ''
     if (file.fileSuffix.toLowerCase() === 'pdg') {
@@ -39,13 +43,13 @@ async function preview (attId, type) {
         url = 'book://ssreader/e0?url=' + file.downLoadUrl
       }
     } else if (file.fileSuffix.toLowerCase() === 'pdf') {
-      url = './static/pdf/web/viewer.html?file=' + encodeURIComponent('/api/att/attFile/getFileInfo?fileId=' + file.id)
+      url = viewer + encodeURIComponent('/api/att/attFile/getFileInfo?fileId=' + file.id)
     } else {
       // onlyoffice在线编辑文件转换为pdf预览 -> kkfileview预览乱码
       if (file.onlined && file.onlined === 1) {
         const res = await queryConvertAtt({ attId })
         if (res.ok && res.data) {
-          url = '/static/pdf/web/viewer.html?file=' + encodeURIComponent('/api/att/attFile/getFileInfo?fileId=' + res.data.attId)
+          url = viewer + encodeURIComponent('/api/att/attFile/getFileInfo?fileId=' + res.data.attId)
         } else {
           this.$message.error('文档未转换成功或本地读取不到该文档')
           return