In this paper, we study the regularity that the dispersion equation of MSFVW; in a magnetic anisotropy multilayer structure with finite width varies periodically with the number of magnetic layers increasing. After introducing three self-defined functions, the universal dispersion equation of MSFVW in an arbitrary multilayer magnetic structure is obtained Using similar procedure, a universal dispersion equation of MSBVW in the multilayer struc-ture has also been derived.