diff --git a/kernel/model/file.go b/kernel/model/file.go
index e397c3b4f..2c7ff6b16 100644
--- a/kernel/model/file.go
+++ b/kernel/model/file.go
@@ -674,6 +674,9 @@ func GetDoc(startID, endID, id string, index int, query string, queryTypes map[s
 
 	var keywords []string
 	if 0 == queryMethod || 1 == queryMethod { // 只有关键字搜索和查询语法搜索才支持高亮
+		if 0 == queryMethod {
+			query = stringQuery(query)
+		}
 		typeFilter := buildTypeFilter(queryTypes)
 		keywords = highlightByQuery(query, typeFilter, rootID)
 	}