diff --git a/src/renderer/src/views/model/index.vue b/src/renderer/src/views/model/index.vue
index 4bc6ebb..a10a761 100644
--- a/src/renderer/src/views/model/index.vue
+++ b/src/renderer/src/views/model/index.vue
@@ -402,8 +402,8 @@ const changeBook = async(data) => {
   let cata = parseCataByNode(data.node)
   currentNode.value = data.node
   uploadData.value.levelFirstId = cata[0]
-  uploadData.value.levelSecondId = cata[1]
-  uploadData.value.levelThirdId = cata[2]
+  uploadData.value.levelSecondId = cata[1]==null||cata[1]== undefined ? '' : cata[1]
+  uploadData.value.levelThirdId = cata[2]==null||cata[2]== undefined ? '' : cata[2]
   uploadData.value.textbookId = data.textBook.curBookId
   getModelInfo({cataid: currentNode.value.id}).then(res=>{
     console.log(res)