Abstract: A 3D rigid-plastic and coupled thermo-mechanical FEM model for hot ring rolling has been established based on software DEFORM3D,and further the distribution features and the influence law of temperature and strain field on the hot ring rolling process have been simulated and analyzed.The results show that with the hot ring rolling processing,the equivalent strain increases staged and the temperature variates wavily;the maximum and minimum equivalent strain appear on the ring outer-plane and mid-plane respectively;at the beginning of the forming,the temperature of outer-plane changes a lot,and with the rolling processing,the temperature of mid-plane trends to increase and the temperature of inner-plane always is the minimum;with the increase of initialization temperature,roll force decreases obviously,but the variable tendency is identical.