diff --git a/src/connection.rs b/src/connection.rs
index c173d7b..8083d05 100644
--- a/src/connection.rs
+++ b/src/connection.rs
@@ -1074,6 +1074,21 @@ impl ConnectionManager {
                         0,
                         true,
                         opcua::client::DataChangeCallback::new(move |dv, item| {
+                            // 检查是否有 BadNoSubscription 错误
+                            if let Some(status) = &dv.status {
+                                if *status == opcua::types::StatusCode::BadNoSubscription {
+                                    tracing::warn!(
+                                        "Detected BadNoSubscription in data change callback for source {}, triggering reconnection",
+                                        current_source_id
+                                    );
+                                    // 触发重连
+                                    if let Some(tx) = manager.reconnect_tx.as_ref() {
+                                        let _ = tx.send(current_source_id);
+                                    }
+                                    return;
+                                }
+                            }
+
                             let client_handle = item.client_handle();
                             let val = dv.value;
                             let timex = Some(Utc::now());