In order to improve the processing efficiency of lens in fisheye lens, traditional rigid disk and elastic disk are replaced by designed three-piece nonblocking fixture for fine grinding and polishing. The production efficiency is enhanced. In the polishing process, the effect of glues on surface form can be avoided by utilizing fused polyurethane instead of blocking glues. The stability of aperture in polishing and fine grinding processes of hem machine is enhanced by using the rubber band instead of the pressure gage in the equipment. The regulatory usage of molds in polishing and fine grinding processes is in favor of improving production efficiency. The impact of impressions and scratches on the surfaces of the parts caused by edging process are avoided effectively by adjusting the sequence of polishing and mechanical centering and edging. The production efficiency is enhanced and the labor intensity is reduced by improving the structure of fixture for smearing ink. In production, the production efficiency of three-piece nonblocking fixture is lower, and how to successfully develop multi-piece nonblocking fixture is the focus of the further work.