Objective Study the changes of hemodynamics after stent intervention to sinuous aneurysms. Method Geometrically idealized model of three-dimensional sinuous aneurysms and curved stent was constructed using CAD software. Numerical simulations of stented and nonstented models were performed respectively in steady flow according to CFD method using finite element software. Hemodynamics data in the two models were compared in terms of flow field, pressure and the distribution of Wall Shear Stress (WSS). Result Velocity of blood flow in stented model is greatly weaken than the nonstented, and the local high pressure is markedly decreased at the proximal aneurismal dome, and the pressure along the wall of the distal aneurysm is also decreased and more uniform. The local elevated WSS at the proximal lip of the distal aneurysm disappeared after stent intervention, instead small and uniform WSSs distribute along a majority of the aneurismal wall. Conclusions Velocity of flow is obviously depressed after stent intervention, and the counterpoised pressure distribution of the stented model is more uniform with the weakened flow velocity in the aneurysm cavity, which are beneficial to the thrombus formation in the aneurismal cavity.