The collision response of the same quality thin-walled components with different cross-section such as circular、square、rectangle、hexagonal and octagonal were got by using nonlinear element soft LS-DYNA at different oblique load. Deformation mode, the peak force-crushing and energy absorption characteristics of all thin-walled components with different cross section were compared. The numerical results showed crashworthiness of square-shaped thin-walled members were significantly better than others, but the rectangular cross section was the weakest.