Building steel bar stretching and straightening device

The utility model relates to the technical field of straightening devices, and discloses a building reinforcing steel bar stretching and straightening device which comprises a reinforcing steel bar straightening machine, supporting legs are fixedly connected to the four corners of the bottom of the reinforcing steel bar straightening machine, and a rust removing mechanism is connected to one sideof the reinforcing steel bar straightening machine. The rust removing mechanism comprises a fixing cylinder, a connecting cylinder, a gear ring, a driving motor, a gear, a supporting plate, a fixing block, a steel brush and two springs, the fixing cylinder is fixedly connected to an outlet of the steel bar straightening machine, the connecting cylinder is rotatably connected to the cylinder wall of the fixing cylinder through a bearing, and the supporting plate is fixedly connected to the side, away from the steel bar straightening machine, of the connecting cylinder. One ends of the two springs are fixedly connected