An metal injection molding method is a forming method for injecting metal powder and plastifying mixtures of binders of the metal powder into a model; the selected metal powder and the binders are mixed, and then the mixtures are granulated and undergo injection molding for forming required shapes; the mixtures have the viscous flow characteristic of polymers through the polymers, and the uniformity of forming, die cavity filling and powder packing can be improved. The invention provides a technology for machining glasses spring shells through metal powder injection molding and a product thereof. The technology and the product thereof have the beneficial effects that because complex cavities can be formed in one step in an injection mode, machine tools, clamps, cutters and manpower resources for machining can be greatly saved; the cavities of the glasses spring shells can be designed optimally, and therefore the spring shells and spring cores can be matched more accurately; the concave-convex separation-preventing design is adopted, and therefore the problem that original spring cores are easily separated when being matched with the glasses spring shells can be solved; the straight wall type design structure of the glasses spring shells is realized and is widely applied; the cavities are directly formed in the injection molding process, and therefore a lot of material is saved.