diff --git a/frontend/src/pages/Roster.tsx b/frontend/src/pages/Roster.tsx
index 8b299da..9ed2d38 100644
--- a/frontend/src/pages/Roster.tsx
+++ b/frontend/src/pages/Roster.tsx
@@ -70,16 +70,17 @@ export default function Roster() {
   const pagination = rosterData?.pagination || { page, pageSize, total: 0, totalPages: 0 }
 
   // 从 URL query 参数自动定位员工（从待办跳转时）
+  const employeeParam = searchParams.get('employee')
   useEffect(() => {
-    const emp = searchParams.get('employee')
-    if (emp) {
-      setSearch(emp)
-      // 搜索结果加载后自动打开第一个匹配的员工
-      if (!isLoading && employees.length > 0 && !selectedId) {
-        setSelectedId(employees[0].id)
-      }
+    if (!employeeParam) return
+    setSearch(employeeParam)
+    // 只有当 debouncedSearch 与参数一致时，搜索结果才真正匹配
+    if (debouncedSearch === employeeParam && !isLoading && employees.length > 0 && !selectedId) {
+      setSelectedId(employees[0].id)
+      // 清除 URL 参数，避免后续搜索时重复触发
+      setSearchParams({}, { replace: true })
     }
-  }, [searchParams, isLoading, employees, selectedId])
+  }, [employeeParam, debouncedSearch, isLoading, employees, selectedId, setSearchParams])
 
   const addMutation = useMutation({
     mutationFn: (data: any) => api.post('/employees', data),