The steel billet transmission system adopts a chain plate transmission structure to make the steel billet move at a uniform speed. The transmission device adopts chain plate transmission, which increases the contact area between the transmission device and the steel plate, making the steel plate transmission more stable. In the experiment, it should be noted that the thermocouple wire connecting the steel plate and the temperature collection device is rolled into the chain plate during the steel plate transmission process. The chain plate transmission device is composed of a reduction motor, a chain plate, a chain, and a support bracket. The reduction motor is fixed on one side of the end of the transmission device, and the motor drives the chain plate through a chain, while the steel plate is placed on the chain plate and moves with the movement of the chain plate.