Traditional　mixed　index　method　combines　the　inverted　file　with　a　structure　index　and　implements　the　retrieval　of　both　context　and　structure.　However,　it　is　neither　efficient　nor　supports　for　xml　documents　updating.　this　study　presents　a　novel　mixed　index　method　to　overcome　these　disadvantages.　It　can　be　used　to　optimize　the　query　of　path　expression,　decrease　the　number　of　update　operations,　accelerate　the　process　of　real-time　update　and　shorten　the　response　time.　Experiments　show　that　our　strategy　is　effective　and　efficient.　©　2010　IEEE.