Abstract: In order to enable the operating performance of the filter press shop to be evaluated on a scientific and rational basis,an analysis is made of the factors involved in evaluating the operating performance of the filter press shop in Zhujidong Coal Preparation Plant,and finally,3 factors,viz: thickness of slime layer in thickener,number of plates of filter press and proportion of raw coal treated,are selected as evaluation criteria. Following the determination of an appropriate fuzzy comprehensive evaluation model based on analytic hierarchy process（ AHP） and fuzzy mathematics theory,a fuzzy mathematics- based model is then proposed for the evaluation of the operating performance of the filter press shop of the plant on a shift by shift basis. Practice shows the model is highly adaptable and can objectively reflect the operating performance of each shift.