diff --git a/src/services/sseHandler.ts b/src/services/sseHandler.ts
index d2c94bf..4750c0a 100644
--- a/src/services/sseHandler.ts
+++ b/src/services/sseHandler.ts
@@ -331,6 +331,11 @@ function dispatchEvent(
     case 'context_usage':
       callbacks.onContextUsage?.(data as ContextUsageEvent);
       break;
+    case 'heartbeat':
+      // 心跳事件：仅用于保持连接，不需要特殊处理
+      // Node.js req.setTimeout 会在收到数据时自动重置计时器
+      console.log('[SSE] 收到心跳');
+      break;
     default:
       console.log(`[SSE] 未知事件类型: ${eventType}`, data);
   }