In　order　to　accelerate　the　execution　of　XQuery,　this　paper　introduces　an　evaluator　named　as　XML　Query　Lazy　Evaluator　(XQLE),　which　uses　lazy　evaluation　optimization　technique.　The　input　language　is　Functional　XML　Query　Language　(FXQL)　that　is　a　functional　language　with　concise　form.　For　data　model,　XQLE　uses　generalized　list　with　the　ability　to　hold　closure　and　XML　node　to　support　lazy　calculation　of　list　node.　Under　lazy　mode,　the　overhead　of　acquiring　the　data　that　has　no　relationship　to　the　final　result　of　calculation　can　be　eliminated.　Finally,　we　use　a　lot　of　example　programs　to　show　the　lazy　evaluator　has　better　performance　compared　with　eager　evaluator　in　the　average　execution　speed.