Aiming　at　the　core　operation　for　XML　data　queries-　Tree　Pattern　Queries,　we　propose　an　effective　method　for　minimizing　XML　query　based　on　XML　Schema.　The　method　can　make　use　of　the　structure　constraints　information　provided　by　XML　Schema　to　optimize　the　tree　query　pattern　containing　the　logic　nodes　AND　and　OR.　Such　tree　pattern　preferably　satisfies　requirements　of　XQuery　queries　describing　and　optimizing　to　support　the　high-performance　implementation　of　XQuery.　©　2013　ACADEMY　PUBLISHER.