Shell oligosaccharide has improve immunity, restrain cancer cell growth, promote liver and spleen antibody formation, promote the absorption of calcium and minerals, proliferation of bifidobacteria, lactobacillus and other beneficial bacterium group, fall hematic fat, fall blood pressure, fall blood sugar, cholesterol, weight loss, prevention of adult diseases, and other functions, sugars said gold shell shell can be used in medicine, functional food, etc.