Using the method to combine masks and plating the spacer layer of the Fabry-Perot filter, germanium and silicon oxide are selected as the high and low index coating materials, 8-channel integrated filter is designed and fabricated with an effective light-transmitting width of 450 μm separated by a block of 30 μm for each channel in the spectral regions of 2.0～2.4 μm. For each channel, the maximum transmittance is greater than 65%, the full width at half maximum (FWHM) is 8～13 nm, as well as, the relative bandwidth is between 0.33%～0.65%.