Method for controlling high-speed flying shear

The invention relates to a method for controlling a high-speed flying shear. The method comprises the steps that a first pulse value P of the starting of a steel poker is calculated; a third pulse value P1cut corresponding to the length between adjacent blades is calculated, and blade rotation pulses are accumulated and counted to obtain a fourth pulse value Pz; original blade rotating blade number N1 corresponding to the distance between rolled piece detection equipment and an intersection point, a fifth pulse value delta P1 corresponding to the remaining length, and a sixth pulse value deltaPn1 of the next blade reaching the intersection position are calculated; if the situation that the sixth pulse value delta Pn1 minus the fifth pulse value delta P1 is greater than the first pulse value P is satisfied, the actual blade rotating blade number Nt is equal to the original blade rotating blade number N1; otherwise, the actual blade rotating blade number Nt is equal to the original blade rotating blade number N