In　order　to　investigate　the　hemodynamic　effect　of　intervention　for　intracranial　serial　saccular　aneurysm　with　semi-circular　section　stent,　four　finite　element　models　of　serial　saccular　aneurysms　were　constructed.　These　models　were　one　model　without　stent　intervention　(U-type)　and　three　models　with　bare　stent　intervention,　including　one　with　circular　section　stent　(C-type),　one　with　semi-circular　section　stent　whose　circular　arch　faces　towards　the　aneurismal　cavity　(ES-type)　and　one　with　semi-circular　section　stent　whose　circular　arch　faces　towards　the　vascular　center　(IS-type).　Computational　fluid　dynamics　simulations　of　physiologically　pulsatile　blood　flow　in　these　models　were　performed.　Velocity　of　blood　flow　in　stented　models　were　effectively　weakened,　and　velocity　near　aneurismal　wall　was　very　low.　Impact　of　blood　flow　on　aneurysm　was　weakened　because　of　stent　intervention.　Magnitude　and　fluctuation　of　wall　shear　stress　were　reduced,　and　the　distribution　of　wall　shear　stress　was　more　balanced.　Pressure　in　aneurysm　was　almost　not　changed,　and　the　pressure　of　stented　models　was　slightly　increased.　Comparison　analysis　of　the　two　aneurismal　cavities　demonstrated　that　the　flow　and　wall　shear　stress　were　basically　same,　and　the　pressure　of　the　distal　cavity　was　lower　than　the　proximal　one.　The　simulation　result　showed　that　IS-type　was　the　best.　These　results　could　provide　some　theoretical　guidance　to　structural　design　of　endovascular　stent.