NOVELTY - Producing saccharin zinc, comprises chemically reacting ortho-sulfonyl benzene and solution of polyimide ammonium, preferably saccharin ammonium and zinc sulfate to produce saccharin zinc hexahydrate crystal, centrifuging, heating and dissolving separated saccharin zinc hexahydrate crystal or crystalline powder to obtain saccharin zinc solution, adding activated carbon into saccharin zinc solution to adsorb pigment and insoluble impurities particles, hot filtering, crystallizing and centrifuging saccharin zinc particles and saccharin zinc mother liquid, washing, drying and sieving.    USE - The saccharin zinc is useful as sweetener, nutritional supplements, anti-deficiency disorder drugs or animal appetite enhancer.    ADVANTAGE - The method: is simple, fast, inexpensive and easy; makes complete use of waste liquid; and ensures reduced environmental pollution and is environmentally friendly. The saccharin zinc products taste good, and is suitable for patients with zinc deficiency, diabetes and obesity.    DETAILED DESCRIPTION - Producing saccharin zinc, comprises (a) chemically reacting 2:1-1.1 ratio of ortho- sulfonyl benzene and a solution of polyimide ammonium, preferably saccharin ammonium and zinc sulfate, zinc chloride, zinc nitrate, or zinc acetate in aqueous solution at lower temperature, to produce saccharin zinc hexahydrate crystal or crystalline powder, (b) centrifuging the solution of saccharin zinc hexahydrate crystal or crystalline powder, (c) heating and dissolving separated saccharin zinc hexahydrate crystal or crystalline powder, in water or zinc saccharin mother liquor, to obtain saccharin zinc solution, adding 0.1-1% solution of activated carbon into saccharin zinc solution, to adsorb pigment and insoluble impurities particles from saccharin zinc solution, hot filtering at 70-90 degrees C, transferring the filtrate to a crystallization container, which is maintained at a acidic pH of 3.5-6.5 and a concentration of 6-13 Be, and crystallizing and recyrstailizing at 80-20 degrees C, and (d) centrifuging saccharin zinc particles and saccharin zinc mother liquid, washing saccharin zinc particles with water, drying to remove water adhering to the surface of the particles, and sieving saccharin zinc hexahydrate crystals to obtain a specific mesh size.