The disadvantages of traditional single-wavelength anti-reflective(AR) coating design are analyzed. Based on the reflectivity index data of coating material in the ultraviolet, visible and near-infrared regions, the proper multilayer coating design is obtained. By manufacturing the offset shutter and by optimizing the process parameters in ion-assisted deposition, the optimized technology of three wavelength anti-reflective coating is found and the three wavelength anti-reflective coating spectral shift caused by temperature is small after one month in air. The reflective index in 1053 nm and 527 nm is below 0.5%.and the reflective index in 351 nm is below 0.2%.