We use current technology to remove the skin and seed of goji, and adopt water solubility and extraction, film separate,ultra filtration, reverse osmosis and freeze-drying technology and extract its polysaccharide, which is one of active components of goji and is rare polysaccharide, that contains protein in vegetable protein. The polysaccharide, which is one of active components of goji is produced by adopting this technology, maximizw reserve the creature activity and nutrition component and the health effect is obvious.