diff --git a/inside-notices/src/main/java/cn/axzo/msg/center/message/service/impl/MessageGroupNodeServiceImpl.java b/inside-notices/src/main/java/cn/axzo/msg/center/message/service/impl/MessageGroupNodeServiceImpl.java
index ebdc4c92..58a9d7ca 100644
--- a/inside-notices/src/main/java/cn/axzo/msg/center/message/service/impl/MessageGroupNodeServiceImpl.java
+++ b/inside-notices/src/main/java/cn/axzo/msg/center/message/service/impl/MessageGroupNodeServiceImpl.java
@@ -79,8 +79,9 @@ public class MessageGroupNodeServiceImpl implements MessageGroupNodeService {
 
     @Override
     public void addGroupNode(MessageGroupNodeSaveOrUpdateParam param) {
-        GroupTreeNodeDTO parent = messageGroupTreeNodeCacheService.queryNode(param.getParentNodeCode())
-                .orElseThrow(() -> new ServiceException("parentNodeCode is invalid"));
+        GroupTreeNodeDTO parent = StringUtils.isBlank(param.getParentNodeCode()) ? null :
+                messageGroupTreeNodeCacheService.queryNode(param.getParentNodeCode())
+                        .orElseThrow(() -> new ServiceException("parentNodeCode is invalid"));
         // 合法性校验
         checkCreateRule(parent, param);
         // 存储
@@ -148,7 +149,9 @@ public class MessageGroupNodeServiceImpl implements MessageGroupNodeService {
     }
 
     private void checkCreateRule(GroupTreeNodeDTO parent, MessageGroupNodeSaveOrUpdateParam param) {
-        AssertUtil.isTrue(parent.getCategory().getLevel() < param.getCategory().getLevel(), "父节点的类型非法");
+        if (Objects.nonNull(parent)) {
+            AssertUtil.isTrue(parent.getCategory().getLevel() < param.getCategory().getLevel(), "父节点的类型非法");
+        }
     }
 
     private void checkDeleteRule(String nodeCode) {
diff --git a/msg-center-api/src/main/java/cn/axzo/msg/center/service/dto/GroupTreeNodeDTO.java b/msg-center-api/src/main/java/cn/axzo/msg/center/service/dto/GroupTreeNodeDTO.java
index e360c55a..21c25890 100644
--- a/msg-center-api/src/main/java/cn/axzo/msg/center/service/dto/GroupTreeNodeDTO.java
+++ b/msg-center-api/src/main/java/cn/axzo/msg/center/service/dto/GroupTreeNodeDTO.java
@@ -63,22 +63,23 @@ public class GroupTreeNodeDTO implements IBaseTree<GroupTreeNodeDTO, String>, Se
     private List<GroupTreeNodeDTO> nodeChildren = Collections.emptyList();
 
     public MessageGroupTreeNodeResponse toMessageGroupTreeNodeResponse() {
+        List<MessageGroupTreeNodeResponse> children = Optional.ofNullable(nodeChildren)
+                .map(v -> v.stream().map(GroupTreeNodeDTO::toMessageGroupTreeNodeResponse).collect(Collectors.toList()))
+                .orElseGet(Collections::emptyList);
         return MessageGroupTreeNodeResponse.builder()
                 .category(category)
                 .nodeName(nodeName)
                 .nodeCode(nodeCode)
                 .parentNodeCode(parentNodeCode)
-                .children(nodeChildren.stream()
-                        .map(GroupTreeNodeDTO::toMessageGroupTreeNodeResponse)
-                        .collect(Collectors.toList()))
+                .children(children)
                 .build();
     }
 
     public Optional<GroupTreeNodeDTO> getChild(String treeNodeCode) {
-        if (StringUtils.isBlank(treeNodeCode)) {
+        if (StringUtils.isBlank(treeNodeCode) || Objects.isNull(nodeChildren)) {
             return Optional.empty();
         }
-        return getNodeChildren().stream()
+        return nodeChildren.stream()
                 .filter(e -> Objects.equals(e.getNodeCode(), treeNodeCode))
                 .findFirst();
     }