Objective　To　investigate　effects　of　endovascular　stents　with　different　structures　and　wire　cross　section　shapes　on　the　treatment　of　internal　carotid　aneurysm　and　its　influence　on　hemodynamics　and　flexibility.　Method　Based　on　the　same　model　of　internal　carotid　aneurysm,　five　models　with　different　stent　intervention　treatment　were　constructed,　which　had　different　stent　structions　or　wire　cross　section　shapes　while　their　porosity　rates　were　approximately　the　same.　Numerical　simulations　were　performed　using　finite　volume　method　to　get　quantitative　information　of　biomechanics.　Results　Among　the　five　models,　the　mean　flow　rate　in　aneurismal　cavity　decreased　maximally　in　the　model　with　stent　of　rectangular　cross　section.　Wall　shear　stress　in　aneurismal　dome　and　aneurismal　neck　were　found　to　decrease　much　more　in　models　with　circular　cross　section　and　rectangular　spiral　stent.　The　flexibility　of　mesh　stent　was　far　better　than　that　of　the　spiral　stent.　Conclusions　Mesh　stent　with　rectangular　cross　section　has　better　biomechanical　influence　on　the　treatment　of　internal　carotid　aneurysm.　These　findings　may　help　clinicians　to　select　a　proper　stent　when　treating　arterial　aneurysm.