Abstract: The   process   of   forged   semi- high  speed steel(0.74C,0.87Si,4.92Cs,1.05Mo,0.41V)Φ 540 mm× 1530 mm working roll for cold rolling was arc furnace steelmaking + electroslag remelting, forging, dual frequency inducting heating and quenching at surface temperature 1090 ℃ and high temperature tempering at 520 ℃. The distribution of surface hardness was measured by means of grinding layer by layer, the surface hardness of roll was up to HSD92, the hardness of roll at depth 25 mm was HSD90 and at depth 35 mm was HSD87.The structure of roll was tempered martensite and fine dispersed carbide.