Building steel bar cutting device with protection function

The building steel bar cutting device with the protection function comprises a base, a blade and a fixing device, the front end of the upper surface of the base is rotationally connected with a lead screw, the middle of the lead screw is connected with the right end of a positioning block in a penetrating mode, and the right upper end of the base is fixedly connected with a fixing support. A box is hinged to the upper end of the fixing support, a motor is mounted on the right side in the box, a rotating shaft is connected to the middle of the protective cover in a penetrating mode, a first rotating wheel is fixedly connected to the front end of the rotating shaft, a second rotating wheel is fixedly connected to the output end of the motor, and the blade is mounted in the middle of the rotating shaft. An arc-shaped rod is installed on the inner side wall of the upper end of the protective cover, and a fixing device is installed at the left end of the upper surface of the base. According to the building reinfor