1. the Forging Technology of a bearing ring, it is characterized in that, described bearing ring is made up of following component by weight percentage: C: 0.17 ~ 0.23 Ni:3.25 ~ 3.65, Cr:1.25 ~ 1.65, Mn:0.30 ~ 0.60, Si:0.17 ~ 0.37 S :≤0.035 P :≤0.035, and surplus is Fe; Described Forging Technology comprises the steps: 1), the first fire steel ingot will with above-mentioned composition adopts Medium Frequency Induction Heating Furnace heating-up temperature to 1200 DEG C, bar hold, chamfered edge, the wrong mouth of a river; 2), the second fire is to 1) the base material that obtains of step heats again, is heated to 1120 ~ 1150 DEG C, jumping-up, pulling; 3), the 3rd fire is to 2) the base material that obtains of step again heats, is heated to 1050 ~ 1100 DEG C, jumping-up, rotates and flatten, punching, reaming; 4), the 4th fire is to 3) step obtain base material again heat, be heated to 1020 ~ 1050 DEG C, in mould circle, jumping-up is to process, depanning, and reaming is to process, control total forging ratio > 5, shove charge is warmed up to 795 DEG C, and insulation 7h, is cooled fast to 720 DEG C, insulation 5h, is down to 650 DEG C of air coolings of coming out of the stove with 20 DEG C/h cooling velocity; 5), turning groove, closing the whole footpath of cold rolling on shaping staving press, raceway, chamfering one-shot forming, finishing, buffing both ends of the surface; 6), heat treatment: preheating 800 DEG C ~ 850 DEG C, after defect detecting test, after when being less than 450 DEG C, shove charge is preheated to 600 ~ 650 DEG C of insulations, the stove putting into 950 ~ 1000 DEG C again carries out quickly heating up to 1140 ~ 1200 DEG C, 550 ~ 600 DEG C of tempering immediately after employing shrend, be cooled to 400 ~ 450 DEG C in stove after, then air cooling of coming out of the stove.