diff --git a/frontend/src/components/SchemaSidebar.tsx b/frontend/src/components/SchemaSidebar.tsx
index b6fc431..9f9e41c 100644
--- a/frontend/src/components/SchemaSidebar.tsx
+++ b/frontend/src/components/SchemaSidebar.tsx
@@ -14,6 +14,8 @@ interface Props {
   instanceId: string;
   database: string;
   dbType: string;
+  /** Redis 集群模式为 true */
+  clusterMode?: boolean;
   onInsert: (text: string) => void;
   onDatabaseChange?: (db: string) => void;
   /** 为 true 时只显示当前选中的库，不允许切换（数据变更场景防误操作） */
@@ -193,7 +195,7 @@ function formatTTL(ttl: number): string {
 /*  COMPONENT                                                           */
 /* ================================================================== */
 
-export default function SchemaSidebar({ instanceId, database, dbType, onInsert, onDatabaseChange, singleDb }: Props) {
+export default function SchemaSidebar({ instanceId, database, dbType, clusterMode, onInsert, onDatabaseChange, singleDb }: Props) {
   const isMySQL = dbType === 'mysql' || dbType === 'postgres' || dbType === 'postgresql';
   const isRedis = dbType === 'redis';
 
@@ -617,6 +619,11 @@ export default function SchemaSidebar({ instanceId, database, dbType, onInsert,
           <div className="h-full flex flex-col">
             {/* DB + Search */}
             <div className="px-2 py-2 border-b border-[var(--dg-border-light)] space-y-1.5">
+              {clusterMode ? (
+                <div className="px-2 py-1 text-[10px] text-amber-400 bg-amber-500/10 rounded text-center">
+                  集群模式 · DB0
+                </div>
+              ) : (
               <select
                 value={redisDb}
                 onChange={(e) => { setRedisDb(Number(e.target.value)); }}
@@ -626,6 +633,7 @@ export default function SchemaSidebar({ instanceId, database, dbType, onInsert,
                   <option key={i} value={i}>DB{i}</option>
                 ))}
               </select>
+              )}
               <div className="relative">
                 <Search className="absolute left-2 top-1/2 -translate-y-1/2 w-3 h-3 text-[var(--dg-text-muted)]" />
                 <input
diff --git a/frontend/src/pages/QueriesPage.tsx b/frontend/src/pages/QueriesPage.tsx
index ec24b05..47f8f31 100644
--- a/frontend/src/pages/QueriesPage.tsx
+++ b/frontend/src/pages/QueriesPage.tsx
@@ -111,7 +111,7 @@ export default function QueriesPage() {
   const [database, setDatabase] = useState('');
   const [databases, setDatabases] = useState<string[]>([]);
   const [loadingDbs, setLoadingDbs] = useState(false);
-  const [instances, setInstances] = useState<Array<{ id: number; name: string; host: string; port: number; db_type: string }>>([]);
+  const [instances, setInstances] = useState<Array<{ id: number; name: string; host: string; port: number; db_type: string; cluster_mode?: boolean }>>([]);
   const [editorSchema, setEditorSchema] = useState<Record<string, Record<string, string[]>>>({});
   const [executing, setExecuting] = useState(false);
   const [error, setError] = useState('');
@@ -432,6 +432,7 @@ export default function QueriesPage() {
           {showSidebar && instanceId && (
             <div className="w-[280px] shrink-0">
               <SchemaSidebar instanceId={instanceId} database={database} dbType={dbType}
+                clusterMode={selectedInstance?.cluster_mode}
                 onInsert={(text) => {
                   const sep = dbType === 'redis' ? (sql.trim() ? '\n' : '') : (sql.trim() ? ' ' : '');
                   setSql(prev => prev + sep + text + (dbType === 'redis' ? '' : ' '));
diff --git a/frontend/src/pages/TicketCreatePage.tsx b/frontend/src/pages/TicketCreatePage.tsx
index ebb620b..836de7f 100644
--- a/frontend/src/pages/TicketCreatePage.tsx
+++ b/frontend/src/pages/TicketCreatePage.tsx
@@ -19,6 +19,7 @@ interface InstanceItem {
   host: string;
   port: number;
   db_type: string;
+  cluster_mode?: boolean;
 }
 
 interface AuditFinding {
@@ -350,6 +351,7 @@ export default function TicketCreatePage() {
           {showBrowser && instanceId && (
             <div className="w-[280px] shrink-0">
               <SchemaSidebar instanceId={instanceId} database={database} dbType={dbType}
+                clusterMode={selectedInstance?.cluster_mode}
                 onInsert={handleSchemaInsert} singleDb />
             </div>
           )}