Preparing method for coprinus comatus polysaccharide

Coprinus comatus polysaccharide as a fungus medicine is prepared through the technological processes of: slant culture of strain, first and second shaking culture, breathing culture in seed tank, propagating tank and fermentation tank, filteration of fermentation liquid to obtain mycelium, hot water extraction of dry mycelium powder, filteration and concentration, alcohol separation by adding alcohol into concentrated solution, and drying and crushing precipitate after alcohol separation. The said processes is suitable for large-scale prodn.