Endovascular　stents　with　different　porosities　and　wire　cross-section　shapes　may　create　different　effects　on　the　hemodynamics　of　aneurysm　treated　with　interventional　therapy　because　stents　with　different　wire　cross-section　shapes　induce　different　flow　resistances　through　the　stent　strut.　In　order　to　analyze　the　flow　resistance　of　the　new　stent　with　triangular　cross-section　by　numerical　simulation　method,　and　to　provide　a　reference　basis　for　the　structural　design　and　optimization　of　endovascular　stent,　four　kinds　of　models　of　the　triangular　cross-section　bare　stent　were　constructed　using　SoildWorks　2007　software.　Numerical　simulations　of　steady　and　transient　blood　flows　in　the　four　models　were　performed　respectively　according　to　CFD　method　using　finite　element　software　ANSYS　11.　Hemodynamics　data　in　the　four　models　were　collected,　such　as　the　flow　patterns,　the　distribution　of　pressure　and　the　flow　resistance.　The　results　show　that　the　stent　with　triangular　wire　cross-section　can　produce　large　resistance　of　blood　inflow　to　aneurysm　and　small　resistance　of　outflow　from　aneurysm.　Thus,　outflow　is　easy　and　inflow　is　difficult.　Thereby　blood　perfusion　and　flow　of　aneurysm　cavity　is　restrained,　and　the　pressure　of　aneurysm　cavity　is　reduced,　which　plays　certain　effect　on　the　intervention　treatment　of　aneurysm.　This　result　provides　some　instructions　for　the　design　of　stent　structure.　©　2010　International　Federation　for　Medical　and　Biological　Engineering.