The invention discloses a bar stock heating automatic sorting device which comprises a support. The bar stock heating automatic sorting device is characterized by further comprising a discharging plate, a rotating shaft, a rotating shaft sleeve, an upper material supporting plate, a connecting rod, a connecting rod support body and a material distributing plate. One end of the discharging plate is fixedly connected with the support, the other end of the discharging plate and the upper material supporting plate are respectively located on two sides of the rotating shaft sleeve and are fixedly connected with the rotating shaft sleeve, the fixedly arranged connecting rod support body is hinged to the middle of the connecting rod, the lower portion of the connecting rod is connected with a piston rod of a cylinder, the rear end of the cylinder is connected to the support, the upper portion of the connecting rod is hinged to the lower portion of the material distributing plate, and a hinged shaft is placed in a sliding groove of the material distributing plate or the connecting rod. The middle of the material distributing plate is fixedly connected with the rotating shaft, the rotating shaft is placed in the rotating shaft sleeve, a temperature sensor is arranged above the material distributing plate, the cylinder is connected with an air source through a self-control valve, and the temperature sensor and the self-control valve are connected with a programmable logic controller (PLC). The bar stock heating automatic sorting device has the advantages of being high in production efficiency, good in sorting accuracy and high in safety, and overall quality of products is guaranteed.