diff --git a/src/main.rs b/src/main.rs
index 17115e5..7186c40 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -182,10 +182,6 @@ async fn run_mqtt(pool: SqlitePool, tx: broadcast::Sender<String>) {
 
     let (client, mut eventloop) = AsyncClient::new(opts, 100);
 
-    client.subscribe("notify/#", QoS::AtMostOnce).await.unwrap();
-
-    info!("MQTT subscribed to notify/#");
-
     let pool_clone = pool.clone();
     let tx_clone = tx.clone();
 
@@ -214,6 +210,11 @@ async fn run_mqtt(pool: SqlitePool, tx: broadcast::Sender<String>) {
                 }
                 Ok(rumqttc::Event::Incoming(Packet::ConnAck(_))) => {
                     info!("MQTT connected");
+                    // clean_session=true 会在断线后丢弃订阅，重连时必须重新订阅
+                    match client.subscribe("notify/#", QoS::AtMostOnce).await {
+                        Ok(_) => info!("MQTT subscribed to notify/#"),
+                        Err(e) => error!("MQTT subscribe failed: {e}"),
+                    }
                 }
                 Ok(_) => {}
                 Err(e) => {