Abstract: TiO₂ films made from dip-coating system were modified by the magnetron sputtering of WO₃.The thickness, phase, chemical composition and the optical absorption of the films were characterized by means of SEM, XRD, AES, UV-vis reflectance spectra techniques. With irradiation of high-pressure mercury lamp, the photo-catalytic behavior of film magnetron sputtered with WO₃ is weakened in the degradation of orange methyl, while with the addition of UV light filter, the photo-catalytic behavior is enhanced. A preparation method of TiO₂ film with high visible light activity is proposed.