Abstract: In order to reasonably and effectively evaluate the water richness of aquifers under thick loose layer, an evaluation method of water richness of aquifers based on distance function combination-weighted cloud model was proposed. In this study, taking Xinglongzhuang Coal Mine in Yanzhou mining area as the research object, aquifer thickness, permeability coefficient, sandstone thickness, mudstone proportion and fault fractal dimension were selected as the water-rich evaluation indexes. The fault fractal dimension indexes were analyzed and quantified according to fractal theory. The sequence relation analysis method and CRITIC method were adopted. The weight of each index was determined by a combinated weighting model based on distance function. The aquifer richness evaluation method based on cloud model was established. ArcGIS was applied to analyze the water abundence of the aquifer in the study area. The results showed that the water abundance of the study area was strong in the middle, but weak in the northwest and southwest, and was greatly affected by fault structure. The results were consistent with the water abundance classification. These were based on the unit water inflow of boreholes in the study area, and thereby indicating the reliability of the established water abundance evaluation model.