diff --git a/mobile-h5/pages/oa/pdf-preview/index.vue b/mobile-h5/pages/oa/pdf-preview/index.vue
index 657169b2..2d0eb0af 100644
--- a/mobile-h5/pages/oa/pdf-preview/index.vue
+++ b/mobile-h5/pages/oa/pdf-preview/index.vue
@@ -5,6 +5,15 @@
 </template>
 
 <script>
+import { post } from '../../../utils/request.js'
+import { MINIO_BASE_URL } from '../../../utils/config.js'
+import { getToken } from '../../../utils/auth.js'
+
+function authHeader() {
+  const token = getToken()
+  return token ? { Authorization: 'Bearer ' + token } : {}
+}
+
 export default {
   data() {
     return {
@@ -13,18 +22,53 @@ export default {
     }
   },
   onLoad(query) {
-    const url = decodeURIComponent(String((query && query.url) || '').trim())
-    const name = decodeURIComponent(
-      String((query && query.name) || 'approval.pdf').trim()
-    )
-    if (!url || !/^https?:\/\//i.test(url)) {
-      this.tip = '文件地址无效'
-      uni.showToast({ title: '文件地址无效', icon: 'none' })
-      return
-    }
-    this.openPdf(url, name)
+    this.openFromQuery(query || {})
   },
   methods: {
+    async openFromQuery(query) {
+      const name = decodeURIComponent(
+        String((query && query.name) || 'approval.pdf').trim()
+      )
+      const legacyUrl = decodeURIComponent(
+        String((query && query.url) || '').trim()
+      )
+      const fileUrl = decodeURIComponent(
+        String((query && query.fileUrl) || '').trim()
+      )
+
+      let url = ''
+      if (legacyUrl && /^https?:\/\//i.test(legacyUrl)) {
+        url = legacyUrl
+      } else if (fileUrl) {
+        url = await this.resolveDownloadUrl(fileUrl, name)
+      }
+
+      if (!url || !/^https?:\/\//i.test(url)) {
+        this.tip = '文件地址无效'
+        uni.showToast({ title: '文件地址无效', icon: 'none' })
+        return
+      }
+      this.openPdf(url, name)
+    },
+    async resolveDownloadUrl(fileUrl, fileName) {
+      try {
+        const res = await post(
+          '/web/admin/attachment/download-url',
+          {
+            fileUrl,
+            fileName
+          },
+          authHeader()
+        )
+        const u = String(res?.downloadUrl || '').trim()
+        if (u) return u
+      } catch (_) {
+        /* fall through to MinIO base URL */
+      }
+      const base = String(MINIO_BASE_URL || '').replace(/\/$/, '')
+      const key = String(fileUrl || '').replace(/^\//, '')
+      return base && key ? base + '/' + key : ''
+    },
     openPdf(url, name) {
       if (this._opened) return
       this._opened = true
diff --git a/mobile-oa-h5/src/oa/print/exportOaApprovalPdf.js b/mobile-oa-h5/src/oa/print/exportOaApprovalPdf.js
index 7e3affae..f483f8ea 100644
--- a/mobile-oa-h5/src/oa/print/exportOaApprovalPdf.js
+++ b/mobile-oa-h5/src/oa/print/exportOaApprovalPdf.js
@@ -5,8 +5,7 @@
  */
 import html2canvas from 'html2canvas'
 import { jsPDF } from 'jspdf'
-import { uploadAttachment, fetchAttachmentDownloadUrl } from '../../api/oa.js'
-import { attachmentFullUrl } from '../../utils/attachment.js'
+import { uploadAttachment } from '../../api/oa.js'
 import { formatDeptDisplay } from '../kit/oa-dept-value.js'
 import { formatPersonDisplay } from '../kit/oa-person-value.js'
 import { formatIdNameDisplay } from '../../utils/id-name-value.js'
@@ -738,21 +737,6 @@ export function buildPrintBodyHtml(model) {
   return `<style>${buildPrintStylesContent()}</style>${buildPrintPageContent(model)}`
 }
 
-function buildPrintHtml(model) {
-  return `<!DOCTYPE html>
-<html lang="zh-CN">
-<head>
-<meta charset="utf-8"/>
-<meta name="viewport" content="width=device-width,initial-scale=1"/>
-<title>${escapeHtml(model.title)}</title>
-<style>${buildPrintStylesContent()}</style>
-</head>
-<body>
-${buildPrintPageContent(model)}
-</body>
-</html>`
-}
-
 /** 用 canvas 绘制中文页码（jsPDF 内置字体不支持汉字，会乱码） */
 function renderPageLabelCanvas(text) {
   const font = '20px "PingFang SC", "Microsoft YaHei", "Heiti SC", sans-serif'
@@ -873,10 +857,10 @@ function isWeChatMiniWebView() {
   return false
 }
 
-function navigateToHostPdfPreview({ url, fileName }) {
+function navigateToHostPdfPreview({ fileUrl, fileName }) {
   const q =
-    'url=' +
-    encodeURIComponent(url) +
+    'fileUrl=' +
+    encodeURIComponent(fileUrl) +
     '&name=' +
     encodeURIComponent(fileName || 'approval.pdf')
   const path = '/pages/oa/pdf-preview/index?' + q
@@ -927,25 +911,8 @@ export async function exportOaApprovalPdf(detail, opts = {}) {
         return { ok: false, message: '上传 PDF 失败：无文件地址' }
       }
 
-      let openUrl = ''
-      try {
-        const dl = await fetchAttachmentDownloadUrl({
-          fileUrl,
-          fileName: filename
-        })
-        openUrl = String(dl?.downloadUrl || dl?.data?.downloadUrl || '').trim()
-      } catch {
-        /* fall through */
-      }
-      if (!openUrl) {
-        openUrl = attachmentFullUrl(fileUrl) || fileUrl
-      }
-      if (!/^https?:\/\//i.test(openUrl)) {
-        return { ok: false, message: '无法打开 PDF：下载地址无效' }
-      }
-
       const navigated = navigateToHostPdfPreview({
-        url: openUrl,
+        fileUrl,
         fileName: filename
       })
       if (!navigated) {