Auxiliary device for steel cutting

The utility model relates to the technical field of steel cutting corollary equipment, in particular to a steel cutting auxiliary device which comprises a supporting base, a supporting rotating shaft, a connecting groove, a connecting seat, an adjusting lead screw, a pressing arm, a connecting hole, an air cylinder, a connecting disc, a positioning hole and an adjusting knob. The supporting rotating shaft is rotationally connected to the middle position of the transverse part of the bottom of the supporting base, the connecting grooves are formed in the surface of the side, opposite to the supporting rotating shaft, of the vertical part of the supporting base, the connecting bases are rotationally connected to the lower ends of the connecting grooves, and the positions, close to the lower ends, of the adjusting lead screws are rotationally connected with the connecting bases together. The adjusting knob is fixedly connected to the lower end of the adjusting lead screw, the end of the pressing arm is in thread