Belt conveyor is a kind of friction driven continuous machinery for transporting materials. It is mainly composed of frame, conveyor belt, supporting roller, roller, tensioning device, transmission device and so on. It can transfer material to a certain conveying line, from the initial feeding point to the final unloading point, and form a material delivery process. It can not only transport the broken materials, but also transport the finished articles. In addition to the pure material delivery, it can also coordinate with the requirements of the technological process in the production process of various industrial enterprises to form a rhythmic flow operation line.