Abstract: Lineament density,a kind of parameter reflecting the intensity of linear structur,is used to analyze the occurrence in mineral products and energy,the tectonic conditions of engineering geology and seismogeology initially.It is then used to predict the conduit path connecting the swallow holes and karst springs.Because of the subjectivity and uncertainty in predicting cave conduit using seismic attributes,this paper takes Ordovician karst cave conduit in Zhongxiepo area,Lungu Oilfield as the research object and,proposes a lineament density method based on fracture information calculated by ant-tracking and constrained by anisotropy of fracture and dipping-azimuth of bedding plane.The cave conduit prediction can be more accurate and effective by linearment density correction of the prediction by seismic attribute,and eventually will guide the exploration and development of carbonate reservoirs.