An analytical model is developed through elastic plastic mechanics, considering strain鄄hardening of
material, and the formulas of stress,strain,residual stress,springback are given. Based on nonlinear FEM package,the dynamic simulation of roll bending is also carried out. Then stress state, plastic strain distribution, residual stress and springback are analyzed,together with effect of displacement of toproller and multi pass. The result shows that curva ture near the start point is not uniform, but curvature of the middle section of the plate is very uniform if the rolling time is long enough;the radius of bended plate is a power function of displacement of toproller;multi pass can reduce
the fluctuation of curvature,the maximum stress and strain of the plate in bending. Finally,the analytical model and FE model are verified by experiments.