diff --git a/src/tree.py b/src/tree.py
index 767bb8ddf4899843270a268d07b86586117bf727..f0c9d28dd732d957d11aad329eb7a7e03e63a8f1 100644
--- a/src/tree.py
+++ b/src/tree.py
@@ -115,7 +115,7 @@ def gen_tree(data_path):
             dump_json(level_path, level_cfg, exist_ok=True, override=True)
 
         level_node, level_node_children = make_node(
-            level_name, cfg['node_id'], cfg['keywords'])
+            level_name, level_cfg['node_id'], level_cfg['keywords'])
         tree_node['children'].append(level_node)
 
         # 章节点