Steel structure cutting device

The utility model discloses a steel structure cutting device which comprises a machine tool, supporting plates are fixedly connected to the two sides of one end of the upper portion of the machine tool, steel rollers are rotationally matched with the upper portions of the supporting plates, fixing plates are fixedly connected to the two ends of one side of the machine tool, and a right-hand threaded rod and a left-hand threaded rod are rotationally connected between the fixing plates. A threaded frame is in threaded connection between the left-hand threaded rod and the right-hand threaded rod, a driving motor is fixedly connected to the top end of the threaded frame, and a driving wheel is arranged at the driving end of the driving motor; a cutting box is fixedly connected to the upper portion of the machining tool, sliding grooves are formed in the two sides of the bottom end of the interior of the cutting box, a collecting box is arranged in the sliding grooves in a sliding fit mode, and a dust suction pump