diff --git a/apps/assets/api/node.py b/apps/assets/api/node.py
index bb8cc719a..1d8a4f497 100644
--- a/apps/assets/api/node.py
+++ b/apps/assets/api/node.py
@@ -140,7 +140,7 @@ class NodeChildrenApi(mixins.ListModelMixin, generics.CreateAPIView):
                 node_fake = Node()
                 node_fake.id = asset.id
                 node_fake.is_node = False
-                node_fake.parent = node
+                node_fake.parent_id = node.id
                 node_fake.value = asset.hostname
                 queryset.append(node_fake)
         queryset = sorted(queryset, key=lambda x: x.is_node, reverse=True)
diff --git a/apps/assets/models/node.py b/apps/assets/models/node.py
index f407e11b0..4f4f9ad8b 100644
--- a/apps/assets/models/node.py
+++ b/apps/assets/models/node.py
@@ -5,7 +5,7 @@ import uuid
 from django.db import models, transaction
 from django.db.models import Q
 from django.utils.translation import ugettext_lazy as _
-
+from common.utils import with_cache
 
 __all__ = ['Node']
 
@@ -166,6 +166,6 @@ class Node(models.Model):
         obj, created = cls.objects.get_or_create(
             key='0', defaults={"key": '0', 'value': "ROOT"}
         )
+        print(obj)
         return obj
 
-
diff --git a/apps/assets/serializers/node.py b/apps/assets/serializers/node.py
index 00cea71f0..56e01f742 100644
--- a/apps/assets/serializers/node.py
+++ b/apps/assets/serializers/node.py
@@ -64,14 +64,11 @@ class NodeSerializer(serializers.ModelSerializer):
 
     @staticmethod
     def get_parent(obj):
-        return obj.parent.id
+        return obj.parent.id if obj.is_node else obj.parent_id
 
     @staticmethod
     def get_assets_amount(obj):
-        if obj.is_node:
-            return obj.get_all_assets().count()
-        else:
-            return 0
+        return obj.get_all_assets().count() if obj.is_node else 0
 
     def get_fields(self):
         fields = super().get_fields()
diff --git a/apps/common/utils.py b/apps/common/utils.py
index d73c094ec..deaeb5280 100644
--- a/apps/common/utils.py
+++ b/apps/common/utils.py
@@ -16,6 +16,7 @@ import calendar
 import threading
 from io import StringIO
 import uuid
+from functools import wraps
 
 import paramiko
 import sshpubkeys
@@ -395,3 +396,17 @@ class TeeObj:
     def close(self):
         self.file_obj.close()
 
+
+def with_cache(func):
+    cache = {}
+    key = "_{}.{}".format(func.__module__, func.__name__)
+
+    @wraps(func)
+    def wrapper(*args, **kwargs):
+        cached = cache.get(key)
+        if cached:
+            return cached
+        res = func(*args, **kwargs)
+        cache[key] = res
+        return res
+    return wrapper
diff --git a/apps/perms/utils.py b/apps/perms/utils.py
index 36c432826..475acfb68 100644
--- a/apps/perms/utils.py
+++ b/apps/perms/utils.py
@@ -104,6 +104,11 @@ class AssetPermissionUtil:
         return assets
 
     def get_nodes_with_assets(self):
+        """
+        返回节点并且包含资产
+        {"node": {"assets": set("system_user")}}
+        :return:
+        """
         assets = self.get_assets()
         nodes = defaultdict(dict)
         for asset, system_users in assets.items():
@@ -112,7 +117,7 @@ class AssetPermissionUtil:
                 if asset in nodes[node]:
                     nodes[node][asset].update(system_users)
                 else:
-                    nodes[node] = {asset: system_users}
+                    nodes[node][asset] = system_users
         return nodes