diff --git a/frontend/src/pages/admin/AdminDashboard.tsx b/frontend/src/pages/admin/AdminDashboard.tsx
index d1db25f..953e884 100644
--- a/frontend/src/pages/admin/AdminDashboard.tsx
+++ b/frontend/src/pages/admin/AdminDashboard.tsx
@@ -356,6 +356,9 @@ export default function AdminDashboard() {
       return next;
     });
   };
+  // 全选 / 全不选
+  const selectAllUsers = () => setOpFilterUsers(new Set(opStats.map(u => u.user_id)));
+  const clearAllUsers = () => setOpFilterUsers(new Set());
 
   // 表头升降序：无 → 升序 → 降序 → 无
   const toggleOpSort = (key: string) => {
@@ -707,11 +710,17 @@ export default function AdminDashboard() {
         {/* 人员选择 — 人名宫格多选 */}
         <div className="mb-4">
           <div className="mb-2 flex items-center justify-between">
-            <span className="text-xs text-gray-400">人员筛选（可多选，不选 = 全部）</span>
-            <button onClick={() => setOpFilterUsers(new Set())}
-              className={`rounded-full px-3 py-1 text-xs font-medium transition-colors ${opFilterUsers.size === 0 ? "bg-blue-600 text-white" : "bg-gray-100 text-gray-600 hover:bg-gray-200"}`}>
-              全部
-            </button>
+            <span className="text-xs text-gray-400">人员筛选（可多选）</span>
+            <div className="flex gap-1">
+              <button onClick={selectAllUsers}
+                className={`rounded-full px-3 py-1 text-xs font-medium transition-colors ${opFilterUsers.size > 0 && opFilterUsers.size === opStats.length ? "bg-blue-600 text-white" : "bg-gray-100 text-gray-600 hover:bg-gray-200"}`}>
+                全选
+              </button>
+              <button onClick={clearAllUsers}
+                className={`rounded-full px-3 py-1 text-xs font-medium transition-colors ${opFilterUsers.size === 0 ? "bg-blue-600 text-white" : "bg-gray-100 text-gray-600 hover:bg-gray-200"}`}>
+                全不选
+              </button>
+            </div>
           </div>
           <div className="grid gap-1.5" style={{ gridTemplateColumns: "repeat(auto-fill, minmax(72px, 1fr))" }}>
             {opStats.map(u => {