diff --git a/src/utils/kkFilePreview.js b/src/utils/kkFilePreview.js
index 38eec74b..d490a69e 100644
--- a/src/utils/kkFilePreview.js
+++ b/src/utils/kkFilePreview.js
@@ -28,6 +28,9 @@ export function dealUrl (fileUrl) {
   const watermarkTxt = `${userInfo.username} ${userInfo.realname} ${time}`
   // 客户环境预览需要加的加密参数
   const watermarkSign = md5(watermarkTxt + 'cnhtc')
+  // 路径增加时间戳
+  const timestamp = new Date().getTime()
+  fileUrl += `&time=${timestamp}`
   return `${window._CONFIG.onlinePreviewDomainURL}?url=${encodeURIComponent(Base64.encode(fileUrl))}&watermarkTxt=${encodeURIComponent(watermarkTxt)}&watermarkSign=${watermarkSign}`
 }
 
diff --git a/src/utils/previewPdf.js b/src/utils/previewPdf.js
index 8a923440..589d0d9a 100644
--- a/src/utils/previewPdf.js
+++ b/src/utils/previewPdf.js
@@ -5,7 +5,8 @@ const getToken = () => Vue.ls.get(ACCESS_TOKEN)
 
 // 预览pdf
 const previewPdf = (id) => {
-  const url = `${window._CONFIG.domianURL}/sys/common/view/${id}?type=view&at=${getToken()}`
+  const timestamp = new Date().getTime()
+  const url = `${window._CONFIG.domianURL}/sys/common/view/${id}?type=view&at=${getToken()}&time=${timestamp}`
   return `${process.env.BASE_URL}pdfjs/web/viewer.html?file=` + encodeURIComponent(url) + '&.pdf'
 }