Discontinuous deformation analysis solve(DDA)method is a newly developed the discrete element method which employs deal the implicit time-integration scheme to the governing equations low.and open-close spherical iteration(OCI)based method to with contact problem,its computational which efficiency very is relatively However,element has discontinuous deformation In analysis(SDDA),SDDA,uses simple contact type like point-to-point calculation contact,higher removing calculation speed.scheme the framework of the this paper presents a very simple(MDI).contact approach by the OCI that and by adopting maximal and displacement increment Through some verification obtained.examples,it is proved the proposed method is correct effective,and a higher computational efficiency is Discontinuous deformation analysis solve (DDA) method is a newly developed discrete element method which employs deal with implicit time-integration scheme to the governing equations low. And open-close spherical iteration (OCI) based method to with contact problem, its computational which efficiency very is relatively yet, element has discontinuous deformation In analysis (SDDA), SDDA, uses simple contact type like point-to-point calculation contact.scheme the framework of the this paper presents a very simple (MDI) .contact approach by the OCI that and by adopting maximal and displacement increment by some verification obtained.examples, it is proved the proposed method is correct effective, and a higher computational efficiency is