diff --git a/mobile-h5/utils/oa-api.js b/mobile-h5/utils/oa-api.js
index 4a88ecca..38af3fd8 100644
--- a/mobile-h5/utils/oa-api.js
+++ b/mobile-h5/utils/oa-api.js
@@ -1,4 +1,4 @@
-import { get } from './request.js'
+import { get, post, request } from './request.js'
 import { getToken } from './auth.js'
 
 function authHeader() {
@@ -6,6 +6,22 @@ function authHeader() {
   return token ? { Authorization: 'Bearer ' + token } : {}
 }
 
+/** 小程序侧无 URLSearchParams 时用手写 query */
+function buildQuery(params) {
+  const parts = []
+  Object.keys(params || {}).forEach((k) => {
+    const v = params[k]
+    if (v == null || v === '') return
+    parts.push(encodeURIComponent(k) + '=' + encodeURIComponent(String(v)))
+  })
+  return parts.join('&')
+}
+
+function withQuery(path, params) {
+  const qs = buildQuery(params)
+  return qs ? path + '?' + qs : path
+}
+
 export function fetchOaGroupList() {
   return get('/web/admin/oa-approval/groups', authHeader())
 }
@@ -20,3 +36,93 @@ export function fetchOaTemplateDetail(appId) {
     authHeader()
   )
 }
+
+// —— drafts ——
+
+export function fetchOaInstanceDraftList(params) {
+  const p = params || {}
+  return get(
+    withQuery('/web/admin/oa-approval/drafts', {
+      keyword: p.keyword,
+      groupId: p.groupId,
+      updateTimeFrom: p.updateTimeFrom,
+      updateTimeTo: p.updateTimeTo,
+      page: p.page != null ? p.page : 1,
+      pageSize: p.pageSize != null ? p.pageSize : 20
+    }),
+    authHeader()
+  )
+}
+
+export function fetchOaInstanceDraftCount() {
+  return get('/web/admin/oa-approval/drafts/count', authHeader())
+}
+
+export function fetchDeleteOaInstanceDraft(id) {
+  return request({
+    url: '/web/admin/oa-approval/drafts/' + encodeURIComponent(id),
+    method: 'DELETE',
+    header: authHeader()
+  })
+}
+
+export function fetchBatchDeleteOaInstanceDrafts(ids) {
+  return post(
+    '/web/admin/oa-approval/drafts/batch-delete',
+    { ids: ids || [] },
+    authHeader()
+  )
+}
+
+export function fetchSubmitOaInstanceDraft(id, data) {
+  return post(
+    '/web/admin/oa-approval/drafts/' + encodeURIComponent(id) + '/submit',
+    data || {},
+    authHeader()
+  )
+}
+
+// —— tasks ——
+
+export function fetchOaTasks(kind, params) {
+  const p = params || {}
+  const appName = (p.appName || '').trim()
+  const initiatorName = (p.initiatorName || '').trim()
+  const query = {
+    page: p.page != null ? p.page : 1,
+    pageSize: p.pageSize != null ? p.pageSize : 20
+  }
+  if (kind === 'cc') {
+    query.readStatus = p.readStatus != null && p.readStatus !== '' ? p.readStatus : 'unread'
+  }
+  if (appName) query.appName = appName
+  if (initiatorName) query.initiatorName = initiatorName
+  return get(
+    withQuery('/web/admin/oa-approval/tasks/' + encodeURIComponent(kind), query),
+    authHeader()
+  )
+}
+
+export function fetchOaPendingTaskCount() {
+  return get('/web/admin/oa-approval/tasks/pending/count', authHeader())
+}
+
+export function fetchOaCcUnreadCount() {
+  return get('/web/admin/oa-approval/tasks/cc/unread-count', authHeader())
+}
+
+export function fetchMarkOaCcTaskRead(taskId) {
+  return post(
+    '/web/admin/oa-approval/tasks/' + encodeURIComponent(taskId) + '/read',
+    {},
+    authHeader()
+  )
+}
+
+export function fetchBatchMarkOaCcTasksRead(ids) {
+  return post(
+    '/web/admin/oa-approval/tasks/cc/read-batch',
+    { ids: ids || [] },
+    authHeader()
+  )
+}
diff --git a/mobile-oa-h5/src/api/oa.js b/mobile-oa-h5/src/api/oa.js
index e4af0805..2e538138 100644
--- a/mobile-oa-h5/src/api/oa.js
+++ b/mobile-oa-h5/src/api/oa.js
@@ -87,4 +87,47 @@ export function fetchCnHolidayRange(start, end) {
   return get('/cn-holiday/range', { start, end })
 }
 
+// —— 详情 / 办理动作（对齐 web-admin oaApproval.ts）——
+
+export function fetchOaInstanceDetail(id) {
+  return get(`/web/admin/oa-approval/instances/${encodeURIComponent(id)}`)
+}
+
+export function fetchApproveOaTask(taskId, comment) {
+  return post(`/web/admin/oa-approval/tasks/${encodeURIComponent(taskId)}/approve`, {
+    comment
+  })
+}
+
+export function fetchRejectOaTask(taskId, comment) {
+  return post(`/web/admin/oa-approval/tasks/${encodeURIComponent(taskId)}/reject`, {
+    comment
+  })
+}
+
+export function fetchReturnOaTask(taskId, comment) {
+  return post(`/web/admin/oa-approval/tasks/${encodeURIComponent(taskId)}/return`, {
+    comment
+  })
+}
+
+export function fetchAddSignOaTask(taskId, data) {
+  return post(`/web/admin/oa-approval/tasks/${encodeURIComponent(taskId)}/add-sign`, data)
+}
+
+export function fetchTransferOaTask(taskId, data) {
+  return post(`/web/admin/oa-approval/tasks/${encodeURIComponent(taskId)}/transfer`, data)
+}
+
+export function fetchWithdrawOaInstance(instanceId) {
+  return post(
+    `/web/admin/oa-approval/instances/${encodeURIComponent(instanceId)}/withdraw`,
+    {}
+  )
+}
+
+export function fetchMarkOaCcTaskRead(taskId) {
+  return post(`/web/admin/oa-approval/tasks/${encodeURIComponent(taskId)}/read`, {})
+}
+
 export { post, put }