ZnO nano-films were grown on substrate by electrophoretic deposition.High quality ZnO nano-films were deposited on ITO glass substrate in the electrolyte solution consisted of 0.006 M ZnO and 10~(5) M of Mg(NO_3)6H_2O.ZnO nano-films have been characterized by TEM,XRD,Raman and PL.The XRD pattern indicates that ZnO films have polycrystalline hexagonal wurtzite structure.PL spectra show that ZnO films have a strong ultraviolet emission peak at 384 nm,and the visible emission band is barely observed at room temperature.