The　molecular　dynamics　simulation　method　was　used　to　study　the　relationship　between　Al　2　O　3　inclusions　and　hydrogen　in　aluminum　melt.　The　influence　of　Al　2　O　3　on　the　behavior　of　hydrogen　diffusion　in　aluminum　melt　was　analyzed　from　the　mean　square　displacement,　radial　distribution　function　and　coordination　number.　The　simulation　results　show　that　Al　2　O　3　inclusions　can　destroy　the　ordered　arrangement　of　aluminum　atoms　in　the　aluminum　melt　and　form　vacancies.A　large　amount　of　hydrogen　can　accumulate　in　the　vacancies　to　create　the　conditions　for　the　formation　of　hydrogen　bubbles.　And　within　a　certain　range,　the　higher　the　Al　2　O　3　content　in　the　aluminum　melt　is,　the　higher　the　degree　of　hydrogen　aggregation　will　be.　The　A356　aluminum　scrap　regeneration　testfurther　shows　that　Al　2　O　3　and　hydrogen　are　interdependent　and　interactive,　and　removing　oxidation　inclusions　from　aluminum　melt　is　the　fundamental　step　of　eliminating　hydrogen.　©　2018,　Chinese　Mechanical　Engineering　Society.　All　right　reserved.