Bending device for steel structure production

The utility model relates to a bending device for steel structure production, which comprises a support base, the left side and the right side of the support base are both fixedly provided with support frames, the tops of the two support frames are both fixedly provided with a mounting seat, and the top of the mounting seat is fixedly provided with two first cylinders. According to the bending device for steel structure production, a quick-change mechanism is arranged, a rotating shaft is rotated to drive a first bevel gear to rotate, the first bevel gear is meshed with a second bevel gear, then the second bevel gear is driven to rotate while rotating, the second bevel gear drives an adjusting rod to rotate, and therefore under cooperation of threads, the bending speed is increased; and two movable sleeves on the outer surface of an adjusting rod are driven to move oppositely or oppositely, a limiting block is driven by a connecting arm to enter or leave a limiting groove, then a bending module is replaced, a