diff --git a/admin/src/api/tracker/visitors.ts b/admin/src/api/tracker/visitors.ts
index 7ad50ef..54f5ddb 100644
--- a/admin/src/api/tracker/visitors.ts
+++ b/admin/src/api/tracker/visitors.ts
@@ -11,6 +11,9 @@ import request from '@/utils/http'
 /** 访客行（visitors.py `_row`：列表/详情共用行字段） */
 export interface VisitorRow {
   visitor_id: string
+  /** 站点归属（多站点下分辨访客来自哪个站） */
+  site_id: string
+  site_name: string
   country: string
   province: string
   city: string
@@ -97,6 +100,8 @@ export interface VisitorListResp {
  */
 export interface VisitorListParams {
   page?: number
+  /** 站点过滤（site_id；不传 = 全部站点，站点不存在时后端 404 site_not_found） */
+  site?: string
   country?: string
   device_type?: string
   /** 仅 "1" 生效：5 分钟内有行为的在线访客 */
diff --git a/admin/src/views/tracker/visitor/index.vue b/admin/src/views/tracker/visitor/index.vue
index 998d249..52906c3 100644
--- a/admin/src/views/tracker/visitor/index.vue
+++ b/admin/src/views/tracker/visitor/index.vue
@@ -4,6 +4,20 @@
   <div class="visitor-page art-full-height">
     <!-- 筛选栏 -->
     <div class="art-card flex-c flex-wrap gap-x-4 gap-y-3 mb-3 px-5 py-4">
+      <ElSelect
+        v-model="filters.site"
+        class="w-52"
+        :loading="sitesLoading"
+        @change="applyFilters"
+      >
+        <ElOption label="全部站点" :value="ALL_SITES" />
+        <ElOption
+          v-for="site in sites"
+          :key="site.id"
+          :label="`${site.name}（${site.site_id}）`"
+          :value="site.site_id"
+        />
+      </ElSelect>
       <ElInput
         v-model="filters.search"
         class="w-60"
@@ -84,6 +98,7 @@
   import { ElButton } from 'element-plus'
   import { useTable } from '@/hooks/core/useTable'
   import { getVisitors, type VisitorListParams, type VisitorRow } from '@/api/tracker/visitors'
+  import { getSites, type SiteRow } from '@/api/tracker/sites'
   import { countryFlag, formatDateTime, formatStay } from '@/utils/tracker'
 
   defineOptions({ name: 'TrackerVisitor' })
@@ -107,7 +122,24 @@
   }
 
   // ---------- 筛选 ----------
+  // 站点筛选（哨兵值 ALL_SITES = 全部站点，请求时映射为不传 site；与 dashboard 同款模式）
+  const ALL_SITES = 'ALL_SITES'
+  const sites = ref<SiteRow[]>([])
+  const sitesLoading = ref(false)
+
+  const loadSites = async () => {
+    sitesLoading.value = true
+    try {
+      sites.value = await getSites()
+    } catch {
+      // 失败已由请求层统一 ElMessage 提示，下拉保持"全部站点"
+    } finally {
+      sitesLoading.value = false
+    }
+  }
+
   const filters = reactive({
+    site: ALL_SITES,
     search: '',
     deviceType: '',
     country: '',
@@ -119,6 +151,7 @@
   /** 组装请求参数：online/show_bot 用后端哨兵 '1'（类型已锁字面量），空值不发送 */
   const buildFilterParams = (): VisitorListParams => {
     const params: VisitorListParams = {}
+    if (filters.site !== ALL_SITES) params.site = filters.site
     const search = filters.search.trim()
     if (search) params.search = search
     if (filters.deviceType) params.device_type = filters.deviceType
@@ -190,6 +223,9 @@
 
   const renderSource = (val: string) => h('span', { class: 'whitespace-nowrap' }, val || '—')
 
+  const renderSite = (row: VisitorRow) =>
+    h('span', { class: 'whitespace-nowrap' }, row.site_name || '—')
+
   // ---------- 表格 ----------
   /** 后端页大小固定 20（PAGE_SIZE）：useTable 侧同步 size=20 才能算对总页数；size 不实际发送 */
   const fetchVisitors = (params: VisitorListParams & { size?: number }) => getVisitors(params)
@@ -226,6 +262,12 @@
           minWidth: 200,
           formatter: renderLocation
         },
+        {
+          prop: 'site_name',
+          label: '所属站点',
+          minWidth: 110,
+          formatter: (row: VisitorRow) => renderSite(row)
+        },
         {
           prop: 'device_type',
           label: '设备',
@@ -282,6 +324,7 @@
 
   const resetFilters = () => {
     Object.assign(filters, {
+      site: ALL_SITES,
       search: '',
       deviceType: '',
       country: '',
@@ -291,6 +334,8 @@
     })
     applyFilters()
   }
+
+  onMounted(loadSites)
 </script>
 
 <style lang="scss" scoped>
diff --git a/server/tracker/api/visitors.py b/server/tracker/api/visitors.py
index 28f390a..db8f96e 100644
--- a/server/tracker/api/visitors.py
+++ b/server/tracker/api/visitors.py
@@ -1,8 +1,9 @@
 """访客列表/详情/跨天时间线/单会话接口（管理台）。
 
-M1 单组织多站点：访客 API 不做 site 过滤参数（后台看全站访客流，站点维度在 Dashboard）。
+M1 单组织多站点：访客列表支持 ?site= 可选过滤（缺省聚合全部站点），行内随带站点归属
+（site_id/site_name）——多站点下分辨访客来自哪个站；访客数据本身已按站点隔离。
 访客列表查询按 (site,-last_seen_at) 索引逐站扫描或全表 order_by——M1 规模（万级访客）可接受，
-量级上来后按站点分片或引入 site 过滤即可（索引已就位）。
+量级上来后按站点分片即可（索引已就位）。
 """
 from datetime import datetime, time, timedelta
 
@@ -12,7 +13,7 @@ from rest_framework.response import Response
 from rest_framework.views import APIView
 
 from tracker.api.envelope import EnvelopeMixin, ok
-from tracker.models import Event, VisitSession, Visitor
+from tracker.models import Event, Site, VisitSession, Visitor
 
 PAGE_SIZE = 20
 TIMELINE_DEFAULT_DAYS = 30
@@ -36,6 +37,8 @@ def _row(visitor, last_session, online_cutoff):
     """列表/详情共用行字段。last_source 依赖最近会话（由调用方批量取好传入，防 N+1）。"""
     return {
         "visitor_id": visitor.visitor_id,
+        # 站点归属：visitor.site 需随行 select_related("site")，否则逐行多一条查询
+        "site_id": visitor.site.site_id, "site_name": visitor.site.name,
         "country": visitor.country, "province": visitor.province, "city": visitor.city,
         "device_type": visitor.device_type, "os": visitor.os,
         "browser": visitor.browser, "language": visitor.language,
@@ -106,7 +109,7 @@ def _page_visitors(qs, request):
         page = 1
     page = max(1, page)
 
-    page_qs = _annotate(qs).order_by("-last_seen_at", "-pk")
+    page_qs = _annotate(qs).select_related("site").order_by("-last_seen_at", "-pk")
     visitors = list(page_qs[(page - 1) * PAGE_SIZE: page * PAGE_SIZE])
     latest = {s.pk: s for s in VisitSession.objects.filter(
         pk__in=[v.latest_session_pk for v in visitors if v.latest_session_pk])}
@@ -163,13 +166,21 @@ def _merge_page_stay(events):
 
 class VisitorListView(EnvelopeMixin, APIView):
     def get(self, request):
-        rows, total, page = _page_visitors(Visitor.objects.all(), request)
+        qs = Visitor.objects.all()
+        sid = request.query_params.get("site")   # 可选站点过滤，缺省聚合全部（与 dashboard 同款）
+        if sid:
+            site = Site.objects.filter(site_id=sid).first()
+            if not site:
+                return _not_found("site_not_found")
+            qs = qs.filter(site=site)
+        rows, total, page = _page_visitors(qs, request)
         return ok({"list": rows, "total": total, "page": page})
 
 
 class VisitorDetailView(EnvelopeMixin, APIView):
     def get(self, request, visitor_id):
-        visitor = _annotate(Visitor.objects.filter(visitor_id=visitor_id)) \
+        visitor = _annotate(Visitor.objects.filter(visitor_id=visitor_id)
+                            .select_related("site")) \
             .order_by("-last_seen_at", "-pk").first()
         if not visitor:
             return _not_found("visitor_not_found")
diff --git a/server/tracker/tests/test_visitors.py b/server/tracker/tests/test_visitors.py
index d70d9cf..1ddf157 100644
--- a/server/tracker/tests/test_visitors.py
+++ b/server/tracker/tests/test_visitors.py
@@ -74,10 +74,10 @@ def test_list_fields_and_default_bot_excluded(client, member_user):
     assert d["total"] == 2 and d["page"] == 1 and len(d["list"]) == 2
     assert [x["visitor_id"] for x in d["list"]] == ["v1", "v2"]   # last_seen 倒序
     row = d["list"][0]
-    assert set(row) == {"visitor_id", "country", "province", "city", "device_type", "os",
-                        "browser", "language", "first_seen_at", "last_seen_at", "visit_count",
-                        "active_days", "session_count", "total_stay_ms", "first_source",
-                        "last_source", "online"}
+    assert set(row) == {"visitor_id", "site_id", "site_name", "country", "province", "city",
+                        "device_type", "os", "browser", "language", "first_seen_at",
+                        "last_seen_at", "visit_count", "active_days", "session_count",
+                        "total_stay_ms", "first_source", "last_source", "online"}
     assert row["country"] == "中国" and row["os"] == "Windows" and row["browser"] == "Chrome"
     assert row["session_count"] == 2
     assert row["total_stay_ms"] == 150000            # 120000+30000，有效停留口径
@@ -125,6 +125,34 @@ def test_list_filters_and_search(client, member_user):
     assert ids(d) == ["old-visitor"]                                          # last_seen 落在昨天
 
 
+def test_list_site_fields_and_site_filter(client, member_user):
+    _auth(client, member_user)
+    site_a = Site.objects.create(name="站点A", domains=["a.com"])
+    site_b = Site.objects.create(name="站点B", domains=["b.com"])
+    _visitor(site_a, "va", last_seen=timezone.now())
+    _visitor(site_b, "vb", last_seen=timezone.now() - timedelta(hours=1))
+
+    d = client.get("/api/admin/visitors").json()["data"]                     # 缺省聚合全部站点
+    assert d["total"] == 2 and len(d["list"]) == 2
+    by_id = {x["visitor_id"]: x for x in d["list"]}
+    assert by_id["va"]["site_id"] == site_a.site_id and by_id["va"]["site_name"] == "站点A"
+    assert by_id["vb"]["site_id"] == site_b.site_id and by_id["vb"]["site_name"] == "站点B"
+
+    d = client.get("/api/admin/visitors", {"site": site_b.site_id}).json()["data"]
+    assert d["total"] == 1 and [x["visitor_id"] for x in d["list"]] == ["vb"]  # 只剩本站访客
+
+
+def test_list_site_not_found(client, member_user):
+    _auth(client, member_user)
+    site = Site.objects.create(name="s", domains=["a.com"])
+    _visitor(site, "v1", last_seen=timezone.now())
+
+    r = client.get("/api/admin/visitors", {"site": "site_nope"})
+    assert r.status_code == 404
+    body = r.json()
+    assert body["code"] == 404 and body["data"] is None and body["message"] == "site_not_found"
+
+
 def test_list_pagination_and_order(client, member_user):
     _auth(client, member_user)
     site = Site.objects.create(name="s", domains=["a.com"])
@@ -153,6 +181,7 @@ def test_detail_shape(client, member_user):
     r = client.get("/api/admin/visitors/v1")
     assert r.status_code == 200
     d = r.json()["data"]
+    assert d["site_id"] == site.site_id and d["site_name"] == "s"   # 详情同样输出站点归属
     assert d["screen"] == "1920x1080" and d["timezone_name"] == "Asia/Shanghai"
     assert d["last_ip"] == "1.2.3.4" and d["first_utm"] == {"utm_source": "google"}
     assert d["first_landing_path"] == "/landing" and d["first_referrer_domain"] == "google.com"