In order to meet the special requirements for filter coating of the space optical communication system, a narrow-band filter with high rejection in near-infrared band was prepared. The filter can reduce the interference of the stray light perfectly in the range of deep background. Through analyzing the characteristics of the coating materials, continually optimizing the film system design curve, an easily prepared narrow-band filter film structure was obtained. Thin films were prepared through electron beam evaporation method and ion-assisted deposition technique, and the thickness of the filter was controlled using crystal-controlled and light control monitoring methods at the same time. By continually optimizing technical parameters, the transmittance of the central wavelength increased, and the filter membrane with better spectral performance was obtained successfully. After the spectrum testing, the average transmittance of the filter is lower than 0.3% at the band of 800~1 530 nm and 1 600~1 800 nm, the transmittance at 1 565 nm is higher than 92% and the full-width at half maximum of the filter is 18 nm, and the technical requirements of the optical system are satisfied.