Abstract:Under the background of a hot rolling strip, the control algorithm and mathematical model of the memorial feed- forward Automatic Width Control (MFF- AWC) was analyzed. The calculated strip hardness from the exit preceded stand processed by memory function was taken as the inspected hardness in feed- forward control. Based on this, the MFF- AWC model was designed, which was aiming at the timely control of the opening degree of downriver edger mill with the width fluctuation. In this way it can attain the goal of precontrol. As a result, the width precision of rolling strip was improved obviously after the MFF- AWC model was into service.