The invention discloses a steel band splitting machine which comprises a left stander, a right stander, an upper cutting roller and a lower cutting roller, wherein the cutting rollers comprise roller shafts, fixed cutting disks, movable cutting disks, adjustment pads and rubber conveying belts; upper linings and upper locking nuts which are used for fixing the upper movable cutting disk are respectively arranged at two ends of the roller shafts; the movable cutting disks and the roller shafts are matched through splines. According to the steel band splitting machine, the positions of the upper movable cutting disk and the lower movable cutting disk can be adjusted by increasing or decreasing the upper adjustment pad and the lower movable adjustment pad, so that a distance between the movable cutting disk and the fixed cutting disk can be changed; therefore, steel bands with different widths can be cut, the requirement on the production of steel pipes of different specifications can be met, and the use range is wider; furthermore, a rubber transmission belt is arranged on the roller shafts and can increase friction between the roller shafts and the steel bands, and the steel bands can be conveyed forwards more stably.