Objective The effect of different geometry configurations of abdominal aortic aneurysm on hemodynamics was investigated to supply some information for clinical diagnosis on aneurysm rupture. Methods Different models of the aneurysms were established using its Image data. The flow in the aneurysm was analysed by using the method of computational fluid dynamics under the condition of pulsatile input flow, rigid wall and Newtonian blood flow. The differences of these models were compared. Results The asymmetry model would cause larger value of wall shear stress comparably and have influence on the rupture of aneurysm. The vortexes in the models with excursion of peak value and in the deflected model were changed with different geometry configurations. Conclusion The different geometry configurations of AAA(abdominal aortic aneurysm) would affect the hemodynamics in the aneurysm.