Design and manufacture of a new type of filters which meet the infrared therapy apparatus needs. By selectively filtering for the light of the infrared light emitted by the therapy apparatus, reducing the portion of the band light carrier energy, improving the safety performance of the therapy apparatus. Based on the use requirements of the filters to infrared therapy apparatus, chose Ti3O5 and SiO2 as high and low refractive index materials respectively. 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.By repeatedly optimizing technical parameters, the band-pass filter was prepared. The average transmittance of the filter is higher than 92% at the band of 600-1200nm, the average transmittance of the broad band-pass filter is less than 2% at the band of 300-550nm and1270nm-2000nm. To solve the problem of the single sided film was too thick to prepared. Based on the concept of splitting technical requirements, the double-sided of the color filter were coated. The results show that the difficulty of preparation are reduced, and filters can be easily manufactured in a large scale, the filter meets the actual requirements.