diff --git a/front/src/views/instructionManual/index.vue b/front/src/views/instructionManual/index.vue
index 6e599ca7..285b118a 100644
--- a/front/src/views/instructionManual/index.vue
+++ b/front/src/views/instructionManual/index.vue
@@ -7,7 +7,7 @@
           @click="changeName({ name: '技术文档' })">
           技术文档
         </div>
-        <abilityDocTree style="max-height:400px;overflow-y:auto" :dataList="treeArray" @treeClick="treeClick"
+        <abilityDocTree style="max-height:320px;overflow-y:auto" :dataList="treeArray" @treeClick="treeClick"
           :clickData="clickData"></abilityDocTree>
       </div>