By recurring to the theory of Guest-H ost effect,a polymer network stabilized liquid crystal film is produced in 10 4 Gauss magnetic field,and the film is transparent with anisotropic orientation in its shut state.Investigations show that applying a suitable electric field t o the film,a high anisotropic light scattering can be obtained.i.e.high light pol arization.A structure model is established for explicating and discussing the ex perimental results. -