Aiming at the multispectral common path in multispectral imaging,the antireflection film with tri-waveband on ZnSe substrate was designed. By selecting the appropriate film material,the film was designed and optimized by TFCalc software. The thermal evaporation and ion impact were used to deposit the film;the transmission spectrum was measured using spectrophotometer and Fourier infrared spectroscopy. The intensity and the adhesion between the substrate and the films were increased effectively by designing the protective layer and adhesive layer. The film can achieve high transmission on TV,1064 nm laser and mid-infrared wavelength,and has good environmental adaptation.