Plate rolling mill and its control method

The present invention is to eliminate sheet passing troubles due to warping of the rolled material, waviness, full wave, the wave-shaped flatness defects that penetrate in the plate width direction such as wavelet, husband and a pair of upper and lower work rolls, said pair of rolls s a pair of motor driven independently, one of the motor controls the roll rotation speed as a control target value, the other motor that rolling torque from the work roll driven by said motor is applied to the rolled material becomes substantially constant plate rolling mill, characterized in that it comprises a control means for controlling the drive torque as a control amount as a control target, and a control method of plate rolling mill.