Abstract: On the basis of the existing methods of point object generalization,and in view of the inadequacy of existing methods,a rough set idea to resolve the problem of point object generalization is put forward.After analyzing the relationship between the classification thinking of rough set and GIS generalization,the feasibility of using rough set method to generalize point object in GIS is explained.The methods and steps of generalizing point object with rough set method are introduced，and the experiment is analyzed.