Angle steel opening equipment

The invention relates to angle steel opening equipment which comprises a punch provided with a straight-strip-shaped punch end, the punch end is provided with a first forming side, the first forming side comprises a first side face and a second side face, the first side face and the second side face are adjacently arranged at an angle alpha, and alpha is larger than or equal to 60 degrees and smaller than or equal to 120 degrees; the lower die is arranged on the extension line of the end part of the punch, and the end surface of the lower die is provided with a blanking hole which is over against the end part of the punch and is matched with the section of the end part of the punch; and the positioning and clamping assembly and the lower die can relatively rotate around a first common edge of the first side surface and the second side surface. The angle steel punching device is simple in structure, adjustment of the angle of a notch punched by the punch on angle steel is achieved, and the angle of the notch e