diff --git a/dsRag/static/tree.html b/dsRag/static/tree.html
index bc5ddc2c..f0723ab6 100644
--- a/dsRag/static/tree.html
+++ b/dsRag/static/tree.html
@@ -214,14 +214,20 @@
 
         // 为每个节点创建checkbox
         allNodes.forEach(node => {
-            console.log('Node title:', typeof node.title, node.title); // 添加调试
             if (node.id !== currentNodeId && !node.isParent) {
                 const div = document.createElement('div');
                 const checkbox = document.createElement('input');
                 checkbox.type = 'checkbox';
                 checkbox.value = node.id;
                 checkbox.id = `node_${node.id}`;
-
+            
+                // 获取当前节点的先修知识列表
+                const currentNode = findNodeById(treeData, currentNodeId);
+                if (currentNode && currentNode.prerequisite) {
+                    // 如果当前节点有这个先修知识，则默认选中
+                    const isSelected = currentNode.prerequisite.some(p => p.id === node.id);
+                    checkbox.checked = isSelected;
+                }
                 const label = document.createElement('label');
                 label.htmlFor = `node_${node.id}`;
                 label.textContent = node.title;  // 修改这里，直接显示节点title