Based on the design theory of frequency doubling reflective films, the design of multi-band high-reflective films on laser cavity surface is realized with the film design software. In the fabrication process, the deterioration problem of the thin film spectral performance caused by the accumulation of the film thickness control error is solved based on the relationship between the residual evaporation amount and the film thickness established by the least square method. The reflectivity of the fabricated thin films at 457 nm and 914 nm is 99.9% and 99.6%, and the transmissivity at 808 nm, 1064 nm and 1342 nm is 97.2%, 96.8% and 93.1%, respectively, which satisfies the requirements of the 457 nm laser.