diff --git a/src/forge/Information/Pages/help.jsx b/src/forge/Information/Pages/help.jsx
index bbcad47e7..5c3fc8d24 100644
--- a/src/forge/Information/Pages/help.jsx
+++ b/src/forge/Information/Pages/help.jsx
@@ -8,6 +8,7 @@ import { findFirstWiki, generateList, getParentKey, getWiki, parseSidebar, wikiP
 import RenderHtml from '../../../components/render-html';
 import { Base64 } from 'js-base64';
 import { getTocContent } from '../../../common/marked';
+import { splitAndCombine } from '../../Wiki/utils';
 
 const { Search } = Input;
 const { DirectoryTree, TreeNode } = Tree;
@@ -47,7 +48,7 @@ function ProjectSource(props) {
         // 默认打开第一个wiki
         const firstWiki = findFirstWiki(menuList);
         if(firstWiki){
-          setExpandedKeys([getParentKey(firstWiki.key, menuList)+"", firstWiki.key+""]);
+          setExpandedKeys(splitAndCombine(firstWiki.key+""));
           setWiki(firstWiki);
         }
         setFlattenedMenuList(generateList(menuList));
@@ -164,7 +165,7 @@ function ProjectSource(props) {
         return null;
       }).filter((item, i, self) => item && self.indexOf(item) === i);
       setSearchValue(va);
-      setExpandedKeys(expandedKeys);
+      setExpandedKeys(splitAndCombine(expandedKeys[0]));
     } else {
       setSearchValue("");
     }
diff --git a/src/forge/Wiki/utils.js b/src/forge/Wiki/utils.js
index c04eca2de..8eede2e38 100644
--- a/src/forge/Wiki/utils.js
+++ b/src/forge/Wiki/utils.js
@@ -5,4 +5,20 @@ export function splicingTabs(count) {
     tabs += "\t";
   }
   return tabs;
+}
+
+// 输入：'2-2-2-1' 返回：['2', '2-2', '2-2-2', '2-2-2-1']
+export function splitAndCombine(str) {
+  if(!str) return []
+  var parts = str.split('-');
+  var result = parts.reduce(function(acc, curr) {
+    if (acc.length === 0) {
+      acc.push(curr);
+    } else {
+      var lastItem = acc[acc.length - 1];
+      acc.push(lastItem + '-' + curr);
+    }
+    return acc;
+  }, []);
+  return result;
 }
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