The heavy-medium consumption was the important economic and technical indicators of heavy medium coal preparation plant, based on the high medium consumption in the Sanhejian plant, the main factors of the high medium consumption were mastered. Through the strength the management of medium, process equipment and coal preparation plant improved the coal preparation plant medium, made tons of coal consumption of medium from 1.5 kg to 0.7 kg, laid the foundation for the comprehensive economic benefits of plant.