Steel structure punching device

The utility model belongs to the technical field of punching equipment, and particularly relates to a steel structure punching device which comprises a protection frame, a balance sleeve is fixedly connected to the middle of the top face of the protection frame in a sleeved mode, and adjusting motors are fixedly installed at the left end and the right end of the top face of the protection frame. A bottom output shaft of the adjusting motor penetrates through the top face of the protection frame, extends to the top of an inner cavity of the protection frame and is fixedly connected with an adjusting lead screw in a sleeving mode, guide rods are fixedly installed at the left end and the right end of the inner cavity of the protection frame correspondingly, the bottom end of the balance sleeve is movably connected with a supporting block in a sleeving mode, and a connecting plate is fixedly installed on the bottom face of the supporting block. Through the arrangement of the balance sleeve, the adjusting motor, t