Aneurysm　is　one　of　essential　cardiovascular　and　cerebrovascular　diseases,　and　endovascular　interventional　neuroradiology　has　become　the　effective　approach　in　clinical　treatment,　so　the　rupture　and　its　prevention　of　aneurysm　is　one　of　prospective　research　in　biomechanics　in　the　21st　century.　As　shown　in　clinical　investigation,　WSS　(wall　shear　stress)　and　pressure/velocity　of　blood　flow　have　played　an　important　role　in　the　growth　and　rupture　of　aneurysm.　It　is　important　to　evaluate　how　about　the　bloodstream　impacting　forces　and　the　local　pressure　elevation　at　the　aneurysm　especially,　considering　patients　individual　difference.　Comparing　with　current　aneurysm　hemodynamic　researches,　corresponding　fundamental　studies　are　presented,　for　example,　numerical　simulation　of　blood　flow　in　aneurysm　with　the　help　of　CFD,　fluid-structure　interaction　model　of　FEM,　and　3D　reconstruction　of　biologic　tissues　based　on　CT,　so　on.　Obtained　results　indicate　that　geometrical　configuration　of　aneurysm　and　vessel,　pulsating　flow　in　inlet,　interaction　between　blood　flow　and　deformation　of　vessel　have　important　influence　on　hemodynamics　of　aneurysm.　Thus,　using　fluid-structure　interaction　model,　numerical　simulation　of　blood　flow　in　aneurysm　based　on　CT　must　be　the　prospective　direction　in　future.