Belt conveyor is a continuous conveying equipment with flexible belt as material bearing part and traction part. According to the principle of friction, it is carried away by motion. The driving drum drives the belt to transport the materials to the required place. The belt is wound through the driving drum at the head and the reversing drum at the tail to form a stepless link belt. The upper and lower sections of the belt are supported on the idler, and the tensioning device gives the belt the tension required for normal operation. During operation, the driving drum drives the belt to run through the friction between it and the belt, and the materials move on the belt together with the belt. The belt conveyor generally uses the upper belt to transport materials, and discharges materials at the end. In particular, it uses a special unloading device to discharge materials at any position。