Abstract: The coal product of Haerwusu Coal Washery is simple in structure,leaving,as a result,limited space for product upgrading.Based on the result of analysis of the present operating status and by reference to the power coal cleaning technologies currently available in China,the scheme for remoulding the washery’s raw coal fines removal system is proposed.Implementation of the technical transformation of the B and C systems has yielded substantial economic benefit because of the rationalized product mix,decrease of yield of saleable coal by 2.74 percentage points and increase of calorific value of saleable coal by 0.63 MJ/kg.