diff --git a/src/modules/mileage/MonitoringView.tsx b/src/modules/mileage/MonitoringView.tsx
index d5c56f9..63a166d 100644
--- a/src/modules/mileage/MonitoringView.tsx
+++ b/src/modules/mileage/MonitoringView.tsx
@@ -133,6 +133,7 @@ export default function MonitoringView() {
       dept: filterDept !== 'All' ? filterDept : undefined,
       project: filterProject !== 'All' ? filterProject : undefined,
       entity: filterEntity !== 'All' ? filterEntity : undefined,
+      plate: filterPlate !== 'All' ? filterPlate : undefined,
       mileageMin: appliedMileageRange.min || undefined,
       mileageMax: appliedMileageRange.max || undefined,
     }).then(d => {
@@ -143,7 +144,7 @@ export default function MonitoringView() {
       setPage(1);
       setHasMore(d.page < d.totalPages);
     }).catch(() => {});
-  }, [sortBy, sortOrder, searchTerm, filterDept, filterProject, filterEntity, appliedMileageRange]);
+  }, [sortBy, sortOrder, searchTerm, filterDept, filterProject, filterEntity, filterPlate, appliedMileageRange]);
 
   // 加载更多
   const loadMore = useCallback(() => {
@@ -159,6 +160,7 @@ export default function MonitoringView() {
       dept: filterDept !== 'All' ? filterDept : undefined,
       project: filterProject !== 'All' ? filterProject : undefined,
       entity: filterEntity !== 'All' ? filterEntity : undefined,
+      plate: filterPlate !== 'All' ? filterPlate : undefined,
       mileageMin: appliedMileageRange.min || undefined,
       mileageMax: appliedMileageRange.max || undefined,
     }).then(d => {
@@ -166,7 +168,7 @@ export default function MonitoringView() {
       setPage(nextPage);
       setHasMore(nextPage < d.totalPages);
     }).catch(() => {}).finally(() => setLoadingMore(false));
-  }, [sortBy, sortOrder, searchTerm, filterDept, filterProject, filterEntity, appliedMileageRange, page, loadingMore, hasMore]);
+  }, [sortBy, sortOrder, searchTerm, filterDept, filterProject, filterEntity, filterPlate, appliedMileageRange, page, loadingMore, hasMore]);
 
   // 筛选/排序变化时重新加载
   useEffect(() => {
diff --git a/src/modules/mileage/api.ts b/src/modules/mileage/api.ts
index 27a4709..dfd159f 100644
--- a/src/modules/mileage/api.ts
+++ b/src/modules/mileage/api.ts
@@ -18,6 +18,7 @@ export async function fetchMonitoring(params?: {
   customer?: string;
   project?: string;
   entity?: string;
+  plate?: string;
   mileageMin?: string;
   mileageMax?: string;
 }): Promise<MonitoringData> {
@@ -31,6 +32,7 @@ export async function fetchMonitoring(params?: {
   if (params?.customer) query.set('customer', params.customer);
   if (params?.project) query.set('project', params.project);
   if (params?.entity) query.set('entity', params.entity);
+  if (params?.plate) query.set('plate', params.plate);
   if (params?.mileageMin) query.set('mileageMin', params.mileageMin);
   if (params?.mileageMax) query.set('mileageMax', params.mileageMax);
   const qs = query.toString();
diff --git a/src/server/routes/mileage.ts b/src/server/routes/mileage.ts
index b04a1a4..a773947 100644
--- a/src/server/routes/mileage.ts
+++ b/src/server/routes/mileage.ts
@@ -156,6 +156,7 @@ app.get('/monitoring', (c) => {
   const entity = c.req.query('entity') || '';
   const mileageMin = c.req.query('mileageMin') || '';
   const mileageMax = c.req.query('mileageMax') || '';
+  const plate = c.req.query('plate') || '';
 
   let vehicles = monitoringCache.vehicles;
 
@@ -172,6 +173,7 @@ app.get('/monitoring', (c) => {
   if (customer) vehicles = vehicles.filter(v => v.customer === customer);
   if (project) vehicles = vehicles.filter(v => v.project === project);
   if (entity) vehicles = vehicles.filter(v => v.entity === entity);
+  if (plate) vehicles = vehicles.filter(v => v.plate === plate);
   if (mileageMin) vehicles = vehicles.filter(v => v.dailyKm >= Number(mileageMin));
   if (mileageMax) vehicles = vehicles.filter(v => v.dailyKm <= Number(mileageMax));