The belt line is composed of flexible conveyor belt (PVC, PV rubber, Teflon, etc.) as the conveying medium, guide rails on both sides, driving rollers on both ends, supporting plate at the bottom of the conveyor belt as the bearing mechanism, and motor, reducer and electric control as the driving mechanism. The belt line can be divided into heavy belt conveyor such as mining belt conveyor, light belt conveyor such as electronic plastic, food light industry, chemical medicine and other industries according to its transportation capacity. This series of belt line has the advantages of strong conveying capacity, long conveying distance, flexible conveying mode (parallel, climbing, turning), wide conveyed medium (solid, fluid, powder, etc.), mature technology, simple maintenance, and convenient implementation of programmed control and automatic operation.