diff --git a/src/connection.rs b/src/connection.rs
index 5463bd5..6a3d7a5 100644
--- a/src/connection.rs
+++ b/src/connection.rs
@@ -328,7 +328,7 @@ impl ConnectionManager {
         let manager = self.clone();
         
         let handle = tokio::spawn(async move {
-            let mut ticker = tokio::time::interval(Duration::from_secs(4)); // 每4秒检测一次心跳
+            let mut ticker = tokio::time::interval(Duration::from_secs(8)); // 每8秒检测一次心跳
             ticker.set_missed_tick_behavior(tokio::time::MissedTickBehavior::Skip);
 
             loop {
@@ -1153,14 +1153,21 @@ impl ConnectionManager {
                 match session
                     .create_subscription(
                         Duration::from_secs(1),
+                        120,
                         10,
-                        30,
                         0,
                         0,
                         true,
                         opcua::client::SubscriptionCallbacks::new(
                             move |notification| {
                                 if notification.status.is_bad() {
+                                    if notification.status == opcua::types::StatusCode::BadTimeout {
+                                        tracing::warn!(
+                                            "Subscription publish timeout for source {}, waiting for heartbeat validation before reconnect",
+                                            current_source_id
+                                        );
+                                        return;
+                                    }
                                     tracing::warn!(
                                         "Subscription status changed to {:?} for source {}, triggering reconnection",
                                         notification.status,