Abstract: The present situation of the intensity zonation of karst development is discussed, and the regulation of the vertical zonation of karst development is proposed. Through taking the karst rate in borehole, the dimension of karst cave and the outflow or leakage water in borehole as quantitative indices, and the feature of stratum, the feature of geoloyical structure and the flow pattern of groundwater as qualitative indices, karst intensity is classified into intensive,mediate and gentle zones,and the intensity grades of karst development are determined by analogism,main factor and fuzzy comprehensive evaluation method.