Auxiliary cutting tool for arc steel plate

The utility model discloses an auxiliary cutting tool for an arc steel plate. The auxiliary cutting tool comprises a tool bracket with a positioning groove, the magnetic attraction device and the guide wheel device are connected to the tool support and can slide along the positioning groove; the guide wheel device is provided with at least one guide wheel, and the rolling direction of the at least one guide wheel is perpendicular to the sliding direction of the positioning groove. The gun nozzle fixing device is arranged on the tool bracket and is positioned in the sliding extension direction of the positioning groove; the guide wheel device is located between the magnetic attraction device and the gun nozzle fixing device. The scheme can be applied to the cutting process of the arc-shaped steel plate, arrangement of an arc line before cutting is not needed, meanwhile, the gas cutting gun is prevented from deviating from a needed arc track in the cutting process, the cutting precision of the arc-shaped steel