The　finite　element　method　was　employed　to　study　effects　of　different　fluid-wall　interaction　models　on　mechanical　behavior　of　blood　flow.　Different　models　were　set　up　according　to　different　inlet　and　outlet　conditions,　and　then　numerical　calculations　were　performed.　The　results　show　that　the　effects　of　different　fluid-wall　interaction　models　on　mechanical　behavior　of　blood　flow　are　significant.　The　relative　blood　flow　velocities　are　different　at　different　time.　The　blood　pressure　changes　are　also　different,　and　reflection　is　presented　in　a　certain　pressure　waveform.