Mechanical model of vibration conveyer with inclination was built, and the model which was based on nonlinear force of material with material combination coefficient was solved and analyzed by analytical method. The results showed that material combination coefficient in inclined face is less than that without inclined face, and material combination coefficient decreased faster than damping coefficient when amplitude increased. Moreover, material combination coefficient is lower when rotational speed increased. The same kind of vibratory machines which were based on the analysis of results obtained better dynamic performance and has longer service life.