In medicine, tremella is a widely used and effective Chinese medicine. Traditional Chinese medicine experts believe that tremella has the functions of "strengthening essence and tonifying kidney, moistening lung and promoting fluid production, relieving cough and moistening intestine, invigorating stomach and qi, enriching blood, strengthening heart and strengthening body, strengthening brain and refreshing mind, beauty beauty and prolonging life". According to Zhang Ren 'an's "Antidote of Herbal Poetry", "This thing is moist with Ophiopogon japonicus but not cold, and sweet with Polygonatum odoratum but not greasy. It is an important product for moistening lung and nourishing yin." 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 heteropolysaccharide (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 cor pulmonale in the elderly. It can also protect the liver and improve the body's ability to resist atomic radiation. In addition, by enhancing the antigen ability of the body, the growth of tumor cells is indirectly inhibited, which plays the role of strengthening the body resistance and eliminating pathogens. Therefore, tremella has always been used as a good medicine to prevent and treat various diseases.