Abstract: The coal preparation plant is confronted with a series of troubles because of the treatment of a high-ash raw coal. To solve the problems, 3 raw coal upgrading schemes are worked out based on the result of analysis of the raw coal property. Following a comprehensive analysis made from 3 aspects, i.e. pre-treatment process, initial capital cost and product quality, and through comparative test of the 3 proposed schemes, the scheme using the FGX-24 compound dry cleaning machine is finally selected for its advantages over the other alternative methods. Application of the raw coal upgrading scheme can lead to a predicted reduction of the transport cost by RMB 2.405 4 million per year, creating a favourable economic result.