diff --git a/jetlinks-components/network-component/network-core/src/main/java/org/jetlinks/community/network/utils/DeviceGatewayHelper.java b/jetlinks-components/network-component/network-core/src/main/java/org/jetlinks/community/network/utils/DeviceGatewayHelper.java
index 56ca0bac..ad130d8e 100644
--- a/jetlinks-components/network-component/network-core/src/main/java/org/jetlinks/community/network/utils/DeviceGatewayHelper.java
+++ b/jetlinks-components/network-component/network-core/src/main/java/org/jetlinks/community/network/utils/DeviceGatewayHelper.java
@@ -16,6 +16,7 @@ import reactor.core.publisher.Mono;
 import reactor.util.context.Context;
 
 import java.time.Duration;
+import java.util.Objects;
 import java.util.function.Consumer;
 import java.util.function.Function;
 import java.util.function.Supplier;
@@ -121,22 +122,27 @@ public class DeviceGatewayHelper {
                     .createOrUpdateSession(childrenId,
                                            children,
                                            child -> Mono.just(new ChildrenDeviceSession(childrenId, parentSession, child)),
-                                           Mono::empty));
-
+                                           Mono::empty)
+                    .doOnNext(session -> {
+                        if (session.isWrapFrom(ChildrenDeviceSession.class)) {
+                            ChildrenDeviceSession childrenSession = session.unwrap(ChildrenDeviceSession.class);
+                            //网关发生变化,替换新的上级会话
+                            if (!Objects.equals(deviceId, childrenSession.getParent().getDeviceId())) {
+                                childrenSession.replaceWith(parentSession);
+                            }
+                        }
+                    }));
 
             //子设备注册
             if (isDoRegister(children)) {
-                return Mono
-                    //延迟2秒，因为自动注册是异步的,收到消息后并不能保证马上可以注册成功.
-                    .delay(Duration.ofSeconds(2))
-                    .then(registry
-                              .getDevice(children.getDeviceId())
-                              .flatMap(device -> device
-                                  //没有配置状态自管理才自动上线
-                                  .getSelfConfig(DeviceConfigKey.selfManageState)
-                                  .defaultIfEmpty(false)
-                                  .filter(Boolean.FALSE::equals))
-                              .flatMap(ignore -> sessionHandler))
+                return this
+                    .getDeviceForRegister(children.getDeviceId())
+                    .flatMap(device -> device
+                        //没有配置状态自管理才自动上线
+                        .getSelfConfig(DeviceConfigKey.selfManageState)
+                        .defaultIfEmpty(false)
+                        .filter(Boolean.FALSE::equals))
+                    .flatMap(ignore -> sessionHandler)
                     .then();
             }
             return sessionHandler.then();
@@ -207,7 +213,7 @@ public class DeviceGatewayHelper {
         }
 
         if (doHandle) {
-            then = then.flatMap(opt -> messageHandler.handleMessage(opt, message).thenReturn(opt));
+            then = messageHandler.handleMessage(null, message).then(then);
         }
 
         return this
@@ -260,6 +266,15 @@ public class DeviceGatewayHelper {
             .flatMap(Function.identity());
     }
 
+    private Mono<DeviceOperator> getDeviceForRegister(String deviceId) {
+        return registry
+            .getDevice(deviceId)
+            .switchIfEmpty(Mono.defer(() -> Mono
+                //延迟2秒，因为自动注册是异步的,收到消息后并不能保证马上可以注册成功.
+                .delay(Duration.ofSeconds(2))
+                .then(registry.getDevice(deviceId))));
+    }
+
     private Mono<DeviceSession> createNewSession(String deviceId,
                                                  DeviceMessage message,
                                                  Function<DeviceOperator, Mono<DeviceSession>> sessionBuilder,
@@ -298,7 +313,7 @@ public class DeviceGatewayHelper {
     private Mono<DeviceSession> updateSession0(DeviceSession session,
                                                DeviceMessage message,
                                                Function<DeviceOperator, Mono<DeviceSession>> sessionBuilder) {
-        Mono<Void> after = null;
+        Mono<DeviceSession> after = null;
         //消息中指定保持在线,并且之前的会话不是保持在线,则需要替换之前的会话
         if (isNewKeeOnline(session, message)) {
             Integer timeoutSeconds = message.getHeaderOrDefault(Headers.keepOnlineTimeoutSeconds);
@@ -310,14 +325,13 @@ public class DeviceGatewayHelper {
             Integer timeoutSeconds = message.getHeaderOrDefault(Headers.keepOnlineTimeoutSeconds);
             after = sessionBuilder
                 .apply(session.getOperator())
-                .map(newSession -> new KeepOnlineSession(newSession, Duration.ofSeconds(timeoutSeconds)))
-                .then();
+                .map(newSession -> new KeepOnlineSession(newSession, Duration.ofSeconds(timeoutSeconds)));
         }
         applySessionKeepaliveTimeout(message, session);
         session.keepAlive();
         return after == null
             ? Mono.just(session)
-            : after.thenReturn(session);
+            : after;
     }
 
     private static void applySessionKeepaliveTimeout(DeviceMessage msg, DeviceSession session) {
@@ -348,7 +362,11 @@ public class DeviceGatewayHelper {
 
     //判断保持在线的会话是否以及丢失(服务重启后可能出现)
     private static boolean isKeeOnlineLost(DeviceSession session) {
-        return session instanceof KeepOnlineSession && session.isWrapFrom(LostDeviceSession.class);
+        if (!session.isWrapFrom(KeepOnlineSession.class)) {
+            return false;
+        }
+        return session.isWrapFrom(LostDeviceSession.class)
+            || !session.unwrap(KeepOnlineSession.class).getParent().isAlive();
     }
 
     //判断是否为设备注册