Belt conveyor is a kind of bulk material transportation equipment driven by friction. First of all, the motor drives the drum to rotate through the reducer. Because of the characteristics of long-distance and large traffic volume of the belt conveyor, two or three drive motors are mostly used. Then, the driving roller drives the belt by friction, and transports the materials at the tail of the machine to the head, which is unloaded by the discharge port, so as to complete the transportation work. Among them, the automatic tension system adjusts the belt tension in real time by collecting the tension data, and the holding brake system completes the holding brake shutdown by controlling the holding brake motor.