diff --git a/web/src/pages/TeamsPage.tsx b/web/src/pages/TeamsPage.tsx
index 1745ed9..b139564 100644
--- a/web/src/pages/TeamsPage.tsx
+++ b/web/src/pages/TeamsPage.tsx
@@ -823,7 +823,15 @@ export function TeamsPage() {
                           <td>{m.email}</td>
                           <td>
                             {m.is_team_owner ? (
-                              <span className={styles.ownerBadge}>主管理员</span>
+                              <span className={styles.ownerBadge} style={{ cursor: 'pointer' }} title="点击撤销主管理员身份(变回普通成员)" onClick={async () => {
+                                if (!window.confirm(`撤销 ${m.username} 的主管理员身份?\n确认后将变回普通成员。`)) return;
+                                try {
+                                  // 后端 admin_team_member_role_view 收到 is_team_admin=false 会同时清 is_team_owner
+                                  await adminApi.setMemberRole(detailTeam!.id, m.id, false);
+                                  showToast('已撤销主管理员');
+                                  const { data: refreshed } = await adminApi.getTeamDetail(detailTeam!.id); setDetailTeam(refreshed);
+                                } catch { showToast('操作失败'); }
+                              }}>主管理员</span>
                             ) : m.is_team_admin ? (
                               <span className={styles.adminBadge} style={{ cursor: 'pointer' }} title="点击取消副管理员" onClick={async () => {
                                 try {