In medicine, tremella fuciformis is a widely used and effective traditional Chinese medicine. Chinese medical experts in past dynasties believed that Tremella fuciformis has the functions of "strengthening essence, tonifying kidney, moistening lung, promoting fluid production, relieving cough, moistening intestine, benefiting stomach, invigorating qi, invigorating blood, strengthening heart, strengthening body, nourishing brain, refreshing, beautifying, rejuvenating skin, prolonging life and prolonging life". According to Zhang Ren 'an's "Antidote of Materia Medica Poetry", "This thing has the moistening of Ophiopogon japonicus without its cold, the sweetness of Polygonatum odoratum without its greasy, and it is an important product to moisten the lungs and nourish yin." Up to now, Chinese medicine is still used to treat lung heat cough, lung dryness and dry cough, blood in phlegm, postpartum weakness, constipation, bloody stool and other diseases. According to recent research, tremella contains two kinds of polysaccharides: one is called acidic isopolysaccharide (composed of mannose, xylose and glucuronic acid); The other is called neutral heteropolysaccharide (composed of mannose, xylose, galactose and glucose). Tremella polysaccharide can improve human immunity, and has a significant effect on diffuse bronchitis and pulmonary heart disease in the elderly. It can also protect the liver and improve the body's ability to protect against atomic radiation. In addition, by enhancing the antigen ability of the body,