The multi-layer high-efficiency drying line can be designed with 4, 6 and 8-layer structures according to the customer's site, and can be designed into various forms of drying methods such as steam, gas, natural gas, heat transfer oil and coal according to the user's local fuel conditions. The design structure fully considers factors such as moisture discharge and air pressure, and the energy consumption data can be 10% lower than that of the drying lines of other companies. The running speed of the conveyor belt and the main machine is synchronous, which completely solves the problems of asynchronous running speed and troublesome adjustment and control of the previous single-layer drying line.