Abstract: There are three washed product lines in Yingpanhao Coal Preparation Plant, including two truck loading lines and one train collection station. The original sampling method involved manual shoveling of coal at the head of the belt conveyor, which posed issues such as poor working environment, insufficient representativeness of coal samples, high safety risks, and lack of process control. Through research on intelligent sampling and preparation systems, an intelligent system was designed for the plant. By replacing manual sampling with automatic machine sampling, workers no longer need to handle coal samples. The machine system can precisely control sampling time, quantity, etc., demonstrating better representativeness than manual sampling. Meanwhile, employee work intensity, working environment, and safety risks have been significantly improved.