diff --git a/apps/backend/src/repositories/worker-platform-repo.test.ts b/apps/backend/src/repositories/worker-platform-repo.test.ts
index 19c56f1d..4b1160f0 100644
--- a/apps/backend/src/repositories/worker-platform-repo.test.ts
+++ b/apps/backend/src/repositories/worker-platform-repo.test.ts
@@ -110,6 +110,12 @@ test('后台接单工单支持按接单分类筛选', () => {
   assert.deepEqual(query.params, [7])
 })
 
+test('空白搜索词不生成全表 LIKE 条件', () => {
+  const query = buildWorkOrderWhere({ keyword: '   ' })
+  assert.doesNotMatch(query.whereClause, /LIKE LOWER/)
+  assert.deepEqual(query.params, [])
+})
+
 test('大厅候选按分类上限取队首后再受全局上限限制', () => {
   const query = buildWorkOrderWhere({
     hallCandidateLimit: 20,
diff --git a/apps/backend/src/repositories/worker-platform/work-order-query-repo.ts b/apps/backend/src/repositories/worker-platform/work-order-query-repo.ts
index 3c920410..15a19d68 100644
--- a/apps/backend/src/repositories/worker-platform/work-order-query-repo.ts
+++ b/apps/backend/src/repositories/worker-platform/work-order-query-repo.ts
@@ -58,6 +58,13 @@ export const WORK_ORDER_SELECT = `
   ) share_summary ON TRUE
 `
 
+// Keep the page and total in one filtered query. This avoids running the same
+// joins and share aggregation twice for every list request.
+const LIST_WORK_ORDER_SELECT = WORK_ORDER_SELECT.replace(
+  '  SELECT\n',
+  '  SELECT\n    COUNT(*) OVER()::int AS total_count,\n',
+)
+
 type WorkerOrderOverviewRow = {
   status: string
   order_count: number
@@ -268,15 +275,6 @@ export async function listWorkOrders({
     createdFrom,
     createdTo,
   })
-  const totalResult = await query<{ total: number }>(
-    `
-      SELECT COUNT(*)::int AS total
-      FROM work_orders wo
-      ${joins}
-      ${whereClause}
-    `,
-    params,
-  )
   const offset = (page - 1) * pageSize
   const orderBy =
     sort === 'worker_claimed_at_desc' && workerSharingId
@@ -292,14 +290,30 @@ export async function listWorkOrders({
   const effectiveOrderBy = pinnedFirst ? `wo.pinned_at DESC NULLS LAST, ${orderBy}` : orderBy
   params.push(pageSize, offset)
   const itemsResult = await query<WorkOrderRow>(
-    `${WORK_ORDER_SELECT}
+    `${LIST_WORK_ORDER_SELECT}
      ${joins}
      ${whereClause}
      ORDER BY ${effectiveOrderBy}
      LIMIT $${params.length - 1} OFFSET $${params.length}`,
     params,
   )
-  return { items: itemsResult.rows, total: Number(totalResult.rows[0]?.total || 0) }
+  // A page beyond the end has no row from which to read the window count.
+  // Keep that uncommon pagination edge case correct without restoring a
+  // second query for normal requests.
+  let total = Number(
+    (itemsResult.rows[0] as WorkOrderRow & { total_count?: number })?.total_count || 0,
+  )
+  if (itemsResult.rows.length === 0 && page > 1) {
+    const totalResult = await query<{ total: number }>(
+      `SELECT COUNT(*)::int AS total FROM work_orders wo ${joins} ${whereClause}`,
+      params.slice(0, -2),
+    )
+    total = Number(totalResult.rows[0]?.total || 0)
+  }
+  return {
+    items: itemsResult.rows,
+    total,
+  }
 }
 
 /** 按筛选条件汇总工单，统计范围不受当前分页影响。 */
diff --git a/apps/backend/src/services/worker-platform/worker-hall-service.ts b/apps/backend/src/services/worker-platform/worker-hall-service.ts
index ea297a9f..2a315b8e 100644
--- a/apps/backend/src/services/worker-platform/worker-hall-service.ts
+++ b/apps/backend/src/services/worker-platform/worker-hall-service.ts
@@ -20,6 +20,10 @@ import {
   requireActiveWorkerSession,
   type WorkerSession,
 } from './worker-session-context-service.js'
+import { WorkerListCache } from './worker-list-cache.js'
+
+const HALL_LIST_CACHE_TTL_MS = 2_000
+const hallListCache = new WorkerListCache(HALL_LIST_CACHE_TTL_MS)
 
 export async function listWorkerHallOrders(query: JsonObject = {}, session: WorkerSession) {
   requireActiveWorkerSession(session)
@@ -29,62 +33,66 @@ export async function listWorkerHallOrders(query: JsonObject = {}, session: Work
   const worker = await getRequiredWorker(session.workerId)
   const permissions = resolveWorkerPermissions(worker)
   const visibleDelaySeconds = Number(permissions.visibleDelaySeconds || 0)
-  const visibleAfterIso =
-    visibleDelaySeconds > 0 ? new Date(Date.now() - visibleDelaySeconds * 1000).toISOString() : ''
   const hallConfig = getWorkerHallConfig()
-  const { items, total } = await listWorkOrders({
-    page,
-    pageSize,
-    statuses: [WORK_ORDER_STATUS.OPEN],
-    keyword: String(query.keyword || '').trim(),
-    categoryId: categoryId || 0,
-    hallCandidateLimit: hallConfig.maxVisibleOrders,
-    hallCategoryLimits: hallConfig.categoryMaxVisibleOrders,
-    visibleAfterIso,
-    excludeFilledSharing: true,
-    pinnedFirst: true,
-  })
-  const categories = (await listWorkCategories()).map(mapWorkCategory)
-  const orderIds = items.map((item) => Number(item.id))
-  const shares = await listWorkOrderSharesByOrderIds(orderIds)
-  const myShareByOrderId = new Map(
-    shares
-      .filter(
-        (share) => share.status !== 'cancelled' && Number(share.worker_id) === Number(worker.id),
-      )
-      .map((share) => [Number(share.work_order_id), share]),
-  )
-  const sharingProgressByOrderId = new Map<
-    number,
-    { joinedQuantity: number; pendingSubmissionCount: number }
-  >()
-  for (const share of shares) {
-    if (share.status === 'cancelled') continue
-    const orderId = Number(share.work_order_id)
-    const progress = sharingProgressByOrderId.get(orderId) || {
-      joinedQuantity: 0,
-      pendingSubmissionCount: 0,
-    }
-    progress.joinedQuantity += Number(share.quantity || 0)
-    if (share.status === 'joined') progress.pendingSubmissionCount += 1
-    sharingProgressByOrderId.set(orderId, progress)
-  }
-  return {
-    items: items.map((item) => {
-      const myShare = myShareByOrderId.get(Number(item.id))
-      return {
-        ...mapWorkOrderForWorker(item, permissions),
-        myShare: myShare ? mapWorkOrderShare(myShare) : null,
-        sharingProgress: sharingProgressByOrderId.get(Number(item.id)) || {
-          joinedQuantity: 0,
-          pendingSubmissionCount: 0,
-        },
+  const keyword = String(query.keyword || '').trim()
+  const cacheKey = JSON.stringify([worker.id, page, pageSize, keyword, categoryId || 0])
+  return hallListCache.getOrSet(cacheKey, async () => {
+    const visibleAfterIso =
+      visibleDelaySeconds > 0 ? new Date(Date.now() - visibleDelaySeconds * 1000).toISOString() : ''
+    const { items, total } = await listWorkOrders({
+      page,
+      pageSize,
+      statuses: [WORK_ORDER_STATUS.OPEN],
+      keyword,
+      categoryId: categoryId || 0,
+      hallCandidateLimit: hallConfig.maxVisibleOrders,
+      hallCategoryLimits: hallConfig.categoryMaxVisibleOrders,
+      visibleAfterIso,
+      excludeFilledSharing: true,
+      pinnedFirst: true,
+    })
+    const categories = (await listWorkCategories()).map(mapWorkCategory)
+    const orderIds = items.map((item) => Number(item.id))
+    const shares = await listWorkOrderSharesByOrderIds(orderIds)
+    const myShareByOrderId = new Map(
+      shares
+        .filter(
+          (share) => share.status !== 'cancelled' && Number(share.worker_id) === Number(worker.id),
+        )
+        .map((share) => [Number(share.work_order_id), share]),
+    )
+    const sharingProgressByOrderId = new Map<
+      number,
+      { joinedQuantity: number; pendingSubmissionCount: number }
+    >()
+    for (const share of shares) {
+      if (share.status === 'cancelled') continue
+      const orderId = Number(share.work_order_id)
+      const progress = sharingProgressByOrderId.get(orderId) || {
+        joinedQuantity: 0,
+        pendingSubmissionCount: 0,
       }
-    }),
-    pagination: { page, pageSize, total },
-    categories,
-    visibleDelaySeconds,
-  }
+      progress.joinedQuantity += Number(share.quantity || 0)
+      if (share.status === 'joined') progress.pendingSubmissionCount += 1
+      sharingProgressByOrderId.set(orderId, progress)
+    }
+    return {
+      items: items.map((item) => {
+        const myShare = myShareByOrderId.get(Number(item.id))
+        return {
+          ...mapWorkOrderForWorker(item, permissions),
+          myShare: myShare ? mapWorkOrderShare(myShare) : null,
+          sharingProgress: sharingProgressByOrderId.get(Number(item.id)) || {
+            joinedQuantity: 0,
+            pendingSubmissionCount: 0,
+          },
+        }
+      }),
+      pagination: { page, pageSize, total },
+      categories,
+      visibleDelaySeconds,
+    }
+  })
 }
 
 export async function getWorkerHallLeaderboard(session: WorkerSession, period: unknown = 'all') {
diff --git a/apps/backend/src/services/worker-platform/worker-list-cache.test.ts b/apps/backend/src/services/worker-platform/worker-list-cache.test.ts
new file mode 100644
index 00000000..c86024fe
--- /dev/null
+++ b/apps/backend/src/services/worker-platform/worker-list-cache.test.ts
@@ -0,0 +1,26 @@
+import assert from 'node:assert/strict'
+import test from 'node:test'
+
+import { WorkerListCache } from './worker-list-cache.js'
+
+test('WorkerListCache coalesces concurrent reads and expires entries', async () => {
+  const cache = new WorkerListCache(15)
+  let calls = 0
+  const factory = async () => {
+    calls += 1
+    await new Promise((resolve) => setTimeout(resolve, 1))
+    return { calls }
+  }
+
+  const [first, second] = await Promise.all([
+    cache.getOrSet('same', factory),
+    cache.getOrSet('same', factory),
+  ])
+  assert.deepEqual(first, { calls: 1 })
+  assert.deepEqual(second, { calls: 1 })
+  assert.equal(calls, 1)
+
+  await new Promise((resolve) => setTimeout(resolve, 20))
+  assert.deepEqual(await cache.getOrSet('same', factory), { calls: 2 })
+  assert.equal(calls, 2)
+})
diff --git a/apps/backend/src/services/worker-platform/worker-list-cache.ts b/apps/backend/src/services/worker-platform/worker-list-cache.ts
new file mode 100644
index 00000000..b9f9521a
--- /dev/null
+++ b/apps/backend/src/services/worker-platform/worker-list-cache.ts
@@ -0,0 +1,32 @@
+type CacheEntry = {
+  expiresAt: number
+  value: Promise<unknown>
+}
+
+/** Short-lived read cache that also coalesces concurrent requests. */
+export class WorkerListCache {
+  private readonly entries = new Map<string, CacheEntry>()
+
+  constructor(
+    private readonly ttlMs: number,
+    private readonly maxEntries = 256,
+  ) {}
+
+  getOrSet<T>(key: string, factory: () => Promise<T>): Promise<T> {
+    const now = Date.now()
+    const cached = this.entries.get(key)
+    if (cached && cached.expiresAt > now) return cached.value as Promise<T>
+    if (cached) this.entries.delete(key)
+
+    const value = factory().catch((error) => {
+      this.entries.delete(key)
+      throw error
+    })
+    if (this.entries.size >= this.maxEntries) {
+      const oldestKey = this.entries.keys().next().value
+      if (oldestKey) this.entries.delete(oldestKey)
+    }
+    this.entries.set(key, { expiresAt: now + this.ttlMs, value })
+    return value
+  }
+}
diff --git a/apps/backend/src/services/worker-platform/worker-my-order-service.ts b/apps/backend/src/services/worker-platform/worker-my-order-service.ts
index c599f441..60956083 100644
--- a/apps/backend/src/services/worker-platform/worker-my-order-service.ts
+++ b/apps/backend/src/services/worker-platform/worker-my-order-service.ts
@@ -44,6 +44,10 @@ import {
   type WorkerSession,
 } from './worker-session-context-service.js'
 import { settleOverdueWorkOrders } from './worker-order-timeout-service.js'
+import { WorkerListCache } from './worker-list-cache.js'
+
+const MY_ORDER_LIST_CACHE_TTL_MS = 2_000
+const myOrderListCache = new WorkerListCache(MY_ORDER_LIST_CACHE_TTL_MS)
 
 export async function listWorkerMyOrders(query: JsonObject = {}, session: WorkerSession) {
   requireActiveWorkerSession(session)
@@ -51,62 +55,74 @@ export async function listWorkerMyOrders(query: JsonObject = {}, session: Worker
   const page = normalizePage(query.page)
   const pageSize = normalizePageSize(query.pageSize)
   const vipEvidencePending = normalizeBoolean(query.vipEvidencePending, false)
-  const { items, total } = await listWorkOrders({
+  const permissions = resolveWorkerPermissions(worker)
+  const statuses = normalizeStatuses(query.status)
+  const keyword = String(query.keyword || '').trim()
+  const cacheKey = JSON.stringify([
+    worker.id,
     page,
     pageSize,
-    statuses: normalizeStatuses(query.status),
-    keyword: String(query.keyword || '').trim(),
-    workerSharingId: worker.id,
+    statuses,
+    keyword,
     vipEvidencePending,
-    sort: 'worker_claimed_at_desc',
+  ])
+  return myOrderListCache.getOrSet(cacheKey, async () => {
+    const { items, total } = await listWorkOrders({
+      page,
+      pageSize,
+      statuses,
+      keyword,
+      workerSharingId: worker.id,
+      vipEvidencePending,
+      sort: 'worker_claimed_at_desc',
+    })
+    const workOrderIds = items.map((item) => Number(item.id))
+    const myShares = await listWorkerSharesByWorker(worker.id, workOrderIds)
+    const myShareByOrderId = new Map(myShares.map((share) => [Number(share.work_order_id), share]))
+    const [notes, views, pendingCancelOrderIds, pendingFeedbackOrderIds, materialEventAtByOrderId] =
+      await Promise.all([
+        listWorkerWorkOrderNotes(worker.id, workOrderIds),
+        listWorkerWorkOrderViews(worker.id, workOrderIds),
+        getPendingCancelRequestOrderIds(worker.id, workOrderIds),
+        getPendingFeedbackOrderIds(worker.id, workOrderIds),
+        getLatestMaterialEventAtByOrderIds(workOrderIds),
+      ])
+    const noteByOrderId = new Map(
+      notes.map((item) => [Number(item.work_order_id), String(item.note || '')]),
+    )
+    const viewedAtByOrderId = new Map(
+      views.map((item) => [Number(item.work_order_id), String(item.viewed_at || '')]),
+    )
+    const materialSeenAtByOrderId = new Map(
+      views.map((item) => [Number(item.work_order_id), String(item.material_seen_at || '')]),
+    )
+    return {
+      items: items.map((item) => {
+        const workOrderId = Number(item.id)
+        const materialEventAt = materialEventAtByOrderId.get(workOrderId) || ''
+        const materialSeenAt = materialSeenAtByOrderId.get(workOrderId) || ''
+        const materialUpdated =
+          Boolean(materialEventAt) &&
+          (!materialSeenAt ||
+            new Date(materialEventAt).getTime() > new Date(materialSeenAt).getTime())
+        return {
+          ...mapWorkOrderForWorker(
+            item,
+            permissions,
+            myShareByOrderId.get(workOrderId),
+            noteByOrderId.get(workOrderId) || '',
+            viewedAtByOrderId.get(workOrderId) || null,
+          ),
+          // 问题单分组内的来源角标：平台标记 / 退单审核中 / 反馈处理中。
+          problemMarked: item.status === 'problem',
+          pendingCancelRequest: pendingCancelOrderIds.has(workOrderId),
+          pendingFeedback: pendingFeedbackOrderIds.has(workOrderId),
+          materialUpdated,
+        }
+      }),
+      pagination: { page, pageSize, total },
+    }
   })
-  const permissions = resolveWorkerPermissions(worker)
-  const workOrderIds = items.map((item) => Number(item.id))
-  const myShares = await listWorkerSharesByWorker(worker.id, workOrderIds)
-  const myShareByOrderId = new Map(myShares.map((share) => [Number(share.work_order_id), share]))
-  const [notes, views, pendingCancelOrderIds, pendingFeedbackOrderIds, materialEventAtByOrderId] =
-    await Promise.all([
-      listWorkerWorkOrderNotes(worker.id, workOrderIds),
-      listWorkerWorkOrderViews(worker.id, workOrderIds),
-      getPendingCancelRequestOrderIds(worker.id, workOrderIds),
-      getPendingFeedbackOrderIds(worker.id, workOrderIds),
-      getLatestMaterialEventAtByOrderIds(workOrderIds),
-    ])
-  const noteByOrderId = new Map(
-    notes.map((item) => [Number(item.work_order_id), String(item.note || '')]),
-  )
-  const viewedAtByOrderId = new Map(
-    views.map((item) => [Number(item.work_order_id), String(item.viewed_at || '')]),
-  )
-  const materialSeenAtByOrderId = new Map(
-    views.map((item) => [Number(item.work_order_id), String(item.material_seen_at || '')]),
-  )
-  return {
-    items: items.map((item) => {
-      const workOrderId = Number(item.id)
-      const materialEventAt = materialEventAtByOrderId.get(workOrderId) || ''
-      const materialSeenAt = materialSeenAtByOrderId.get(workOrderId) || ''
-      const materialUpdated =
-        Boolean(materialEventAt) &&
-        (!materialSeenAt ||
-          new Date(materialEventAt).getTime() > new Date(materialSeenAt).getTime())
-      return {
-        ...mapWorkOrderForWorker(
-          item,
-          permissions,
-          myShareByOrderId.get(workOrderId),
-          noteByOrderId.get(workOrderId) || '',
-          viewedAtByOrderId.get(workOrderId) || null,
-        ),
-        // 问题单分组内的来源角标：平台标记 / 退单审核中 / 反馈处理中。
-        problemMarked: item.status === 'problem',
-        pendingCancelRequest: pendingCancelOrderIds.has(workOrderId),
-        pendingFeedback: pendingFeedbackOrderIds.has(workOrderId),
-        materialUpdated,
-      }
-    }),
-    pagination: { page, pageSize, total },
-  }
 }
 
 /** 打手订单标签概览：订单数与预计或已结算金额。 */
diff --git a/apps/frontend/src/pages/worker/WorkerHallPage.tsx b/apps/frontend/src/pages/worker/WorkerHallPage.tsx
index 405d1688..6e3a09d2 100644
--- a/apps/frontend/src/pages/worker/WorkerHallPage.tsx
+++ b/apps/frontend/src/pages/worker/WorkerHallPage.tsx
@@ -89,6 +89,8 @@ export default function WorkerHallPage() {
         ? pagination.page + 1
         : undefined
     },
+    staleTime: 2_000,
+    refetchOnWindowFocus: false,
     retry: false,
   })
 
diff --git a/apps/frontend/src/pages/worker/WorkerOrdersPage.tsx b/apps/frontend/src/pages/worker/WorkerOrdersPage.tsx
index cfaad132..fa46dde8 100644
--- a/apps/frontend/src/pages/worker/WorkerOrdersPage.tsx
+++ b/apps/frontend/src/pages/worker/WorkerOrdersPage.tsx
@@ -179,6 +179,8 @@ export default function WorkerOrdersPage() {
   const ordersQuery = useQuery({
     queryKey: ['worker-my-orders', status, keyword, page, pageSize],
     queryFn: () => fetchWorkerMyOrders(buildWorkerOrderQuery(status, keyword, page, pageSize)),
+    staleTime: 2_000,
+    refetchOnWindowFocus: false,
     retry: false,
   })
   const pagination = ordersQuery.data?.data.pagination