A wide-angle complementary treble-bandpass filter is prepared based on the imaging principle of wavelength-division 3D technology. Via the investigation of film materials, suitable materials are selected as the equivalent spacer layer of the Fabry-Perot filter, which improves energy dispersion and enhance the bandpass transmissivity at a large incident angle of light. With the adjustment of the amount of the reactive gas of inductive coupled plasma, the extinction coefficient of Nb₂O₅ material can be reduced and the film transmissivity at a short wavelength can be enhanced. The experimental test and analysis results show that the prepared complementary treble-bandpass filters process the transmissivity of larger than 92% at each bandpass when light incident at 0°--30°. Moreover, the transmitted light satisfies the color balance index and meets the design requirements.