diff --git a/frontend/src/pages/admin/AdminGroupsPage.tsx b/frontend/src/pages/admin/AdminGroupsPage.tsx
index d636e06..b8ec84d 100644
--- a/frontend/src/pages/admin/AdminGroupsPage.tsx
+++ b/frontend/src/pages/admin/AdminGroupsPage.tsx
@@ -1,6 +1,6 @@
 import { useState, useEffect, useCallback, useMemo } from "react";
-import { Table, Button, Modal, Input, Checkbox, Tag, App, Spin, Empty, Select } from "antd";
-import { Plus, Pencil, Trash2, UserPlus, Crown, ShieldCheck } from "lucide-react";
+import { Table, Button, Modal, Input, Checkbox, Tag, App, Spin, Empty } from "antd";
+import { Plus, Pencil, Trash2, UserPlus, Crown, ShieldCheck, Search, Check } from "lucide-react";
 import { useAuth } from "../../contexts/AuthContext";
 import { isSuperAdmin } from "../../constants/task";
 import { extractErrorMessage } from "../../utils/errorMessage";
@@ -56,6 +56,7 @@ export default function AdminGroupsPage() {
   const [candidates, setCandidates] = useState<MemberCandidate[]>([]);
   const [picked, setPicked] = useState<string[]>([]);   // 多选
   const [pickedLeader, setPickedLeader] = useState(false);
+  const [candidateKeyword, setCandidateKeyword] = useState("");
   const [adding, setAdding] = useState(false);
 
   const load = useCallback(async () => {
@@ -91,6 +92,21 @@ export default function AdminGroupsPage() {
   // 大组列表（下拉用）
   const topGroups = useMemo(() => groups.filter((g) => g.parent_id === null), [groups]);
 
+  // 候选人按关键字过滤 —— 前端过滤即可：LICA 才十几人，一次拉全量更跟手
+  const visibleCandidates = useMemo(() => {
+    const kw = candidateKeyword.trim().toLowerCase();
+    if (!kw) return candidates;
+    return candidates.filter(
+      (c) => c.full_name.toLowerCase().includes(kw) || c.username.toLowerCase().includes(kw)
+    );
+  }, [candidates, candidateKeyword]);
+
+  function togglePick(username: string) {
+    setPicked((prev) =>
+      prev.includes(username) ? prev.filter((u) => u !== username) : [...prev, username]
+    );
+  }
+
   // ============================================================
   // 编辑
   // ============================================================
@@ -194,6 +210,7 @@ export default function AdminGroupsPage() {
       setCandidates(await fetchMemberCandidates());
       setPicked([]);
       setPickedLeader(false);
+      setCandidateKeyword("");
     } catch (err) {
       message.error(extractErrorMessage(err, "加载人员失败"));
     }
@@ -392,30 +409,45 @@ export default function AdminGroupsPage() {
               {detail.members.map((m) => (
                 <div
                   key={m.user_id}
-                  title={
-                    detail.can_manage_members
-                      ? `${m.display_name}（${m.user_id}）· ${m.is_leader ? "点击取消组长" : "点击设为组长"}`
-                      : `${m.display_name}（${m.user_id}）`
-                  }
-                  onClick={() => {
-                    if (detail.can_manage_members) handleToggleLeader(m.user_id, !m.is_leader);
-                  }}
-                  className={`group relative flex h-11 select-none items-center justify-center rounded-lg border px-2 text-sm transition-colors ${
+                  title={`${m.display_name}（${m.user_id}）`}
+                  className={`group relative flex h-[58px] flex-col items-center justify-center rounded-lg border px-2 transition-colors ${
                     m.is_leader
-                      ? "border-amber-300 bg-amber-50 font-medium text-amber-800"
-                      : "border-gray-200 bg-white text-gray-700"
-                  } ${
-                    detail.can_manage_members
-                      ? "cursor-pointer hover:border-blue-300 hover:bg-blue-50"
-                      : ""
-                  }`}
+                      ? "border-amber-300 bg-amber-50"
+                      : "border-gray-200 bg-white"
+                  } ${detail.can_manage_members ? "hover:border-blue-300" : ""}`}
                 >
-                  {m.is_leader && (
-                    <Crown size={12} className="mr-1 shrink-0 text-amber-500" />
-                  )}
-                  <span className="truncate">{m.display_name}</span>
+                  <span
+                    className={`truncate text-sm ${m.is_leader ? "font-medium text-amber-800" : "text-gray-700"}`}
+                  >
+                    {m.display_name}
+                  </span>
 
-                  {/* 移除：默认藏起来，悬停该方块才出现，避免误点 */}
+                  {/* 组长：一个**始终可见**的明确按钮，而不是"点方块"这种隐晦交互。
+                      一个人是不是组长、怎么改，一眼就能看到。
+                      每个方块各管各的 —— 因此**天然支持多个组长**。 */}
+                  {detail.can_manage_members ? (
+                    <button
+                      onClick={() => handleToggleLeader(m.user_id, !m.is_leader)}
+                      title={m.is_leader ? "取消组长" : "设为组长"}
+                      className={`mt-0.5 flex items-center gap-0.5 rounded px-1 text-[11px] transition-colors ${
+                        m.is_leader
+                          ? "bg-amber-100 text-amber-700 hover:bg-amber-200"
+                          : "text-gray-400 hover:bg-amber-50 hover:text-amber-600"
+                      }`}
+                    >
+                      <Crown size={11} />
+                      {m.is_leader ? "组长" : "设为组长"}
+                    </button>
+                  ) : (
+                    m.is_leader && (
+                      <span className="mt-0.5 flex items-center gap-0.5 text-[11px] text-amber-600">
+                        <Crown size={11} />
+                        组长
+                      </span>
+                    )
+                  )}
+
+                  {/* 移出：悬停才出现，避免误点 */}
                   {detail.can_manage_members && (
                     <button
                       title="移出分组"
@@ -430,34 +462,84 @@ export default function AdminGroupsPage() {
             </div>
           )}
 
-          {/* 添加成员面板 —— 用 antd Select 而非原生 select：
-              LICA 有近 20 人，原生下拉会整屏铺开且不能搜，又长又难选。 */}
+          {/* 添加成员面板 —— 不用下拉：候选人全铺成方块，点选即可，无滚动条。
+              LICA 十几人，一次全展示比"展开下拉再翻找"快得多。 */}
           {candidates.length > 0 && (
-            <div className="mt-3 flex flex-wrap items-center gap-3 rounded-lg border border-blue-200 bg-blue-50 p-3">
-              <Select
-                mode="multiple"
-                className="min-w-[300px] flex-1"
-                placeholder="搜索姓名或账号，可多选…"
-                showSearch
-                allowClear
-                autoFocus
-                value={picked}
-                onChange={(v) => setPicked(v)}
-                optionFilterProp="label"
-                maxTagCount="responsive"
-                options={candidates.map((c) => ({
-                  value: c.username,
-                  label: `${c.full_name}（${c.username}）`,
-                }))}
-              />
-              <Checkbox checked={pickedLeader} onChange={(e) => setPickedLeader(e.target.checked)}>
-                设为组长
-              </Checkbox>
-              <div className="flex gap-2">
-                <Button type="primary" size="small" loading={adding} disabled={!picked} onClick={handleAddMember}>
-                  添加
-                </Button>
-                <Button size="small" onClick={() => setCandidates([])}>取消</Button>
+            <div className="mt-3 rounded-lg border border-blue-200 bg-blue-50 p-3">
+              <div className="mb-2.5 flex items-center gap-3">
+                <Input
+                  className="max-w-xs"
+                  size="small"
+                  placeholder="搜索姓名或账号…"
+                  prefix={<Search size={14} className="text-gray-400" />}
+                  value={candidateKeyword}
+                  onChange={(e) => setCandidateKeyword(e.target.value)}
+                  allowClear
+                  autoFocus
+                />
+                <span className="text-xs text-gray-500">
+                  已选 <span className="font-medium text-blue-600">{picked.length}</span> 人
+                  {candidateKeyword && ` · 匹配 ${visibleCandidates.length} 人`}
+                </span>
+              </div>
+
+              {visibleCandidates.length === 0 ? (
+                <div className="py-6 text-center text-sm text-gray-400">没有匹配的人员</div>
+              ) : (
+                <div className="grid gap-2 [grid-template-columns:repeat(auto-fill,minmax(88px,1fr))]">
+                  {visibleCandidates.map((c) => {
+                    const on = picked.includes(c.username);
+                    return (
+                      <button
+                        key={c.username}
+                        type="button"
+                        title={`${c.full_name}（${c.username}）`}
+                        onClick={() => togglePick(c.username)}
+                        className={`relative flex h-11 items-center justify-center rounded-lg border px-1 text-sm transition-colors ${
+                          on
+                            ? "border-blue-500 bg-blue-500 font-medium text-white"
+                            : "border-gray-200 bg-white text-gray-700 hover:border-blue-300 hover:bg-blue-100"
+                        }`}
+                      >
+                        <span className="truncate">{c.full_name}</span>
+                        {on && (
+                          <Check
+                            size={12}
+                            className="absolute right-1 top-1 text-white"
+                          />
+                        )}
+                      </button>
+                    );
+                  })}
+                </div>
+              )}
+
+              <div className="mt-3 flex items-center gap-3">
+                <Checkbox
+                  checked={pickedLeader}
+                  onChange={(e) => setPickedLeader(e.target.checked)}
+                >
+                  同时设为组长
+                </Checkbox>
+                <div className="flex gap-2">
+                  <Button
+                    type="primary"
+                    size="small"
+                    loading={adding}
+                    disabled={picked.length === 0}
+                    onClick={handleAddMember}
+                  >
+                    添加选中的 {picked.length} 人
+                  </Button>
+                  <Button size="small" onClick={() => { setCandidates([]); setCandidateKeyword(""); }}>
+                    取消
+                  </Button>
+                </div>
+                {picked.length > 0 && (
+                  <Button type="link" size="small" onClick={() => setPicked([])}>
+                    清空选择
+                  </Button>
+                )}
               </div>
             </div>
           )}