High-speed special steel finishing mill unit

The utility model discloses a high-speed special steel finishing mill unit which comprises a base and a finishing mill unit mounted on the base and comprising a plurality of staggered finishing mills with the tops crossed at an angle of 45 degrees, wherein a speed-increasing gearbox connected with a motor is arranged on one side of the base and connected with the staggered finishing mills with the tops crossed at the angle of 45 degrees through output shafts on two sides and inter-mill couplings respectively; the finishing mills on each side are connected in series in sequence through the inter-mill couplings. According to the high-speed special steel finishing mill unit, the eight finishing mills are staggered at the angle of 45 degrees, centralized drive is realized, and a design speed of 90 m/s is adopted; the high-speed special steel finishing mill unit is superior to a domestic outdated side-crossed special steel wire finishing mill at present, and the 45-degree top-crossed staggered arrangement avoids a suspension structure of the rolling mill, reduces the height of the rolling center and can improve the rigidity of the finishing mill unit; large vibration during rolling is avoided and a guarantee is provided for increasing the bar rolling speed and improving the size precision.