diff --git a/script/parse/frontmatter.ts b/script/parse/frontmatter.ts
index 21708ce7..ef4338f1 100644
--- a/script/parse/frontmatter.ts
+++ b/script/parse/frontmatter.ts
@@ -41,6 +41,12 @@ export async function extractFrontMatter(source:cheerio.Root,option:Options):Pro
       LogToInfo(`标题格式错误:${sourceTitle}，无法提取索引`)
     }
   }
+  if(index?.includes(".5")) {
+    index = parseInt(index.replace(".5","")).toString().padStart(4,'0') + "_5"
+  }else {
+    index = parseInt(index!).toString().padStart(4,'0')
+  }
+
   title = option.title ? option.title : `【${catagory}${index}】${title.trim()}`
   let description = ""
   if (option.bv !== undefined) {
diff --git a/script/utils/frontmatter.ts b/script/utils/frontmatter.ts
index c78b3b6f..a178a100 100644
--- a/script/utils/frontmatter.ts
+++ b/script/utils/frontmatter.ts
@@ -18,7 +18,7 @@ export async function buildFrontmatter(source:SourceInfo,options:Options):Promis
   if(options.category) {
     catagory = options.category
   }
-  let indexPattern = /\d{1,4}/
+  let indexPattern = /\d{1,4}(\.5)?/
   let index = source.title.match(indexPattern)?.["0"]
   if (!index) {
     index = options.index??"1"
@@ -26,6 +26,11 @@ export async function buildFrontmatter(source:SourceInfo,options:Options):Promis
       LogToInfo(`标题格式错误:${source.title}，无法提取索引`)
     }
   }
+  if(index?.includes(".5")) {
+    index = parseInt(index.replace(".5","")).toString().padStart(4,'0') + "_5"
+  }else {
+    index = parseInt(index!).toString().padStart(4,'0')
+  }
   title = `【${catagory}${index}】${title}`
   let description = ""
   if (options.bv !== undefined) {