This paper presents model investigations into the scattering of polarized radiation in anisotropic plane-parallel media. A polydisperse mixture of ice cylinders oriented mainly horizontally has been selected as a model. It has been supposed that the particles are randomly oriented in a horizontal plane. We have considered different angles of radiation incidence on a medium. The particles have been supposed to be free of admixtures and possessing homogeneous internal structure. The calculations have shown that the anisotropy of scattering media significantly affect the angular behavior of the scattering phase matrix elements with respect to both polar (Θ) and azimuthal (φ) angles.