Abstract: In order to be favorable to water drainage and pumping in coal mines of North China karst water flling, the balanced principle was applied to analyze the composition of the mine water inflow during the mine water drainage and pumping.Three water table dynamic variation curves normally occurred in the mine water drain age and pumping were summarized, including the rapid reduced and rapid stable type curve of the watery aquifer with weak rich water flled, the vertical dropped curve of the aquifer with poor watery and less water flld and a stable sectional reduced curve of the aquifer with high watery and high water flled.In combination with the mi ne water prevention and control cases of four large karst water flling mines, based on the water table drop and the water inflow value ratio obtained from the large water pumping test as the evaluation index, the suitability of the mine water drainage and water pressure drop was studied and could provide the references to the mine wat er drainage and water pumping.