Abstract: The finite element simulation of stress and strain of 230 mm slab with casting rate 1.0 m/min and 3 different roller ways layout-single-point,four-point and continuous straightening have been carried out by elastoplastic finite element method. The results showed that the equivalent Von Mises stress and horizontal stress of slab decreased in turn in single-point,four-point and continuous straightening; compared with single-point straightening,the each point straightening stress and strain rate decreases obviously in four-point straightening; and in continuous straightening,the equivalent plastic strain changes linearly in deformation area up to maximum value 1. 11% with lower equivalent plastic strain rate-about 5.5×10^-5s^-1,its strain rate is minimum,it is a ideal straightening process.