Abstract: In this paper,the fundamental law of the karst caves formed in Wangchuan, the north Qinling Mountains is discussed.In Wangchun region NE and NW direction shearing fractures combining with EW direction main fault formed a neotectonic fracture system which is still moving,and it controls the level extending direction of the karst caves.The level caves on three different elevations at slope reflect the intermittent rise of crust and karstification.stages.Therefor,the level caves can compare with the three level erosion surfaces in the Qinling Mountains.This provids important evidences for the comparison of the karstification periods between the South and the North in the Cenozoic.