A　finite　element　aortic　valve　model　is　described.　The　geometry　and　material　property　of　the　model　are　more　exact　than　before.　The　finite　element　dynamic　analysis　was　used　to,　emulate　the　closed　valve　motion　during　the　early　diastole.　The　results　of　emulating　demonstrate　that　the　closed　valve　vibrates　during　early　diastole.　They　also　reveal　that　the　increase　in　stiffness　of　valve,　the　augmentation　thickness　of　valve,　the　decrease　in　the　rate　of　change　of　the　pressure,　and　the　reduction　of　the　initial　pressure　may　affect　the　vibration　and　cause　the　diminution　of　the　aortic　component　of　the　second　heart　sound.