Ultraviolet communication as a new means of communication receives extensive attention increasingly with its high secrecy, strong anti-interference ability, and other advantages in terms of military. To meet the requirement of ultraviolet communication system, the coatings on a diameter of 210 mm quartz substrates are made to meet the following characteristics: the reflectance at 254 nm is greater than 95% while the average transmittance in 280~600 nm is greater than 98%, which can also applies to angle range from 12° to 30° meanwhile. Through the comparative study on several kinds of the common materials used in ultraviolet areas, HfO2 and MgF2 are selected as the high and low refractive index materials. The film stack is got through the film pile being stacked based on the theory of the design, combining with the needle optimization, and designing the filter of the film. In the preparation of the film, the absorption is reduced by optimizing the parameters, and also the quality improved with ion-assisted deposition used, the film thickness control accuracy is improved by means of the repeatability of parameters accurately control. The results show that the preparation of filter meets the requirements well.