Multi-angle corner cutting device of angle steel

The utility model discloses a multi-angle corner cutting device of angle steel. The multi-angle corner cutting device of the angle steel can be used for machining on a common punching machine, can change the angle of a cut corner of a workpiece in machining, and is convenient to operate. The multi-angle corner cutting device comprises a punching machine working table surface, an upper mould base and a lower mould base, wherein the upper mould base and the lower mould base are respectively provided with a guide pillar guide sleeve. A square upper mould is arranged below the upper mould base, the middle of the bottom of the lower mould base is provided with a step shaft, the step shaft is arranged in a center hole of the working table surface in a matched mode, a lower mould sleeve is arranged above the lower mould base, a lower mould is arranged in the lower mould sleeve, and the two sides of the square upper mould can both serve as upper moulds. Due to the arrangement of the step shaft, the whole mould can ro