In order to investigate the influence of double S plate wheel on rail corrugation,based on the theory that the saturated creep force induces the frictional selfexcited vibration of the wheelsettrack system and then causes rail corrugation,the finite element models of wheelsettrack system of positive and negative double S plate wheels with small curve radius were established by ABAQUS software,and the single S plate wheel was used to validate the model.The complex eigenvalue method was used to study the effects of bending direction,bending degree and thickness of double S plate on rail corrugation.The results show that positive double S plate wheel is a noncorrugated wheel,and the bending degree and plate thickness have no obvious influence on rail corrugation.While negative double S plate wheel tends to cause rail corrugation,and the greater of the bending degree,the more likely it is to cause unstable vibration of the wheelsettrack system.