1Cr13 steel is easy to be cracked in thermal processing. According to the steel alloy phase diagram, a heating specification and the range of forging temperature from 900 to 1180 ℃ were designed. Using the finite element modeling, the influences of pre-upsetting + twisting pressure upsetting process on forging drum, strain-effective and stress-effective were analyzed and compared. The results show that the relative diameter ratio K of pre-upsetting + twist pressure upsetting is 0.71,which is smaller than that of the ordinary. Two fire rolling process was proposed to solve the large rolling deformation resistance and inhomogeneous organization of 1Cr13 ring forgings. The production practice shows that the thermal processing after optimization can reduce forging crack, refine grains, increase forgings size precision, so as to improve the qualified rate of the product.