The flying shear type steel plate shearing machine comprises a shearing machine base and a knife rest seat arranged on the shearing machine base, the knife rest seat is provided with an upper knife rest and a lower knife rest, the upper knife rest is arranged above the lower knife rest, the upper knife rest is provided with an upper scissors, the lower knife rest is provided with a lower scissors, the upper scissors and the lower scissors can be closed; the upper knife rest and the lower knife rest are connected by a connecting rod The upper tool rest is connected with the tool rest seat through a fixed shaft, and the upper tool rest can swing around the fixed shaft; the flying shear type steel plate shearing machine also comprises a driving motor and a crankshaft, and the driving motor is connected with the lower tool rest through the crankshaft. Through the above way, the utility model can reduce energy consumption and improve work efficiency.