Changfulong Gold Deposit is a low-temperature hydrothermal vein-type gold deposit controlled by shear zone.Due to the poor three-dimensional continuity of mineralization,it is difficult to accurately depict the true distribution of mineralization by the traditional method of hand-digitizing.Implicit geological modeling has the characteristics of fast speed,strong repeatability,mathematical and less man interference,so it is especially suitable to deal with the problems of dense sample data and complex surface morphology.In this paper,the radial basis function (RBF) is introduced to carry out three-dimensional implicit geological modeling and grade estimation of Changfulong Gold Deposit,intended to explore how to better solve the problem of delimitation and estimation of complex discontinuous mineralized bodies.The results show that implicit modeling can make a reasonable geological model under appropriate constraints.The accuracy of RBF estimates is similar to that of geostatistical methods,while the former shows a clearer mineralization structure.The research work in a way enlightens the promotion of implicit geological modeling technology application to the field of resource estimation in China.