Objective:　To　propose　and　numerically　simulate　a　novel　stent　with　triangular　wire　cross-section　so　as　to　compare　the　hemodynamic　effect　of　endovascular　stents　in　aneurysm　with　circular,　rectangular　and　triangular　cross-section,　respectively.　Methods:　Three　aneurysm　models　were　constructed　by　implanting　3　kinds　of　stents　separately,　including　one　with　bare　circular　wire　cross-section　stent　(named　CM),　and　one　with　bare　rectangular　wire　cross-section　stent　(named　RM),　and　one　with　bare　triangular　cross-section　stent　(named　TM).　An　unstented　aneurysm　model　was　also　constructed　to　serve　as　the　control　(named　UM).　Four　models　were　preformed　with　numerical　simulation　of　fluid-structure　interaction　under　the　same　boundary　conditions　using　finite　element　method.　Results:　Compared　with　TM　and　CM,　RM　showed　lower　velocity,　higher　flow　resistance　and　longer　turn　over　time,　which　demonstrated　that　the　effect　of　blood　flow　pattern　on　three　stents　was　decreased　in　the　order　of　RM,　TM,　CM.　RM　could　reduce　the　magnitude　and　fluctuation　of　wall　shear　stress　(WSS)　more　significantly　than　that　of　TM　and　CM.　However,　the　pressure　rise　of　TM　and　CM　was　lower　than　that　of　RM.　WSS　distribution　and　deformation　results　indicated　the　possibility　of　aneurysm　development　along　the　distal　wall　was　higher　than　that　along　the　proximal　wall,　and　the　top　of　aneurysm　was　in　the　highest　risk　of　rupture.　Conclusions:　Three　kinds　of　stents　show　differences　of　hemodynamics　in　aneurysm　treatment,　which　provides　significant　references　for　the　structural　design　and　optimization　of　endovascular　stent.