Lentinan(LNT) is a glucan with macromolecular extracted from sporocarp and mycelium of Lentinula edodes,which shows prominent anticancer,antioxidant,immunologic-function-regulation activities,etc.The water-soluble polysaccharide was extracted by hot water,ane the influence factors were the extraction temperature (A),ratio of material to water (B) and extraction time (C) ordered according to the importance.The extraction process of LNT was optimized with orthogonal test.The optimal parameters were 60℃(extrac...