Production method of forged round steel for nuclear power bolts

The invention discloses a production method of forged round steel for nuclear power bolts. The production method comprises the steps of converter smelting, LF refining, VD vacuum degassing, continuous casting, heating of a casting blank heating furnace and round steel forging. The round steel comprises the following chemical components in percentage by mass: 0.37%-0.44% of C, 0.15%-0.35% of Si, 0.60%-0.95% of Mn, less than or equal to 0.020% of P, less than or equal to 0.020% of S, 0.65%-0.95% of Cr, 0.20%-0.30% of Mo, 1.55%-2.00% of Ni and the balance of Fe and inevitable trace impurities, and the total mass fraction is 100%. The strength, toughness and hardness of the forged round steel for the nuclear power bolt are remarkably improved, the overall service life of the forged round steel for the nuclear power bolt is remarkably prolonged, the safety of the forged round steel for the nuclear power bolt is remarkably improved, and therefore the high-performance forged round steel for the nuclear power bolt is