Tremella, also known as white fungus, sex flat, taste gan light, with kidney strengthening brain, strong essence of Nourishing Yin, refreshing, camp blood, strong, heat-clearing lungs, Sheng jin, cough, intestines and stomach, invigorating gas and strong heart and other effects. Contains protein, fat, calcium, as well as polysaccharides, crude fiber and so on. There are three kinds of polysaccharide in Tremella, such as a, B and C, which inhibit the growth of tumor, among which the polysaccharide C has the best effect. Other ingredients, such as crude fiber and calcium, have the effect of preventing cancer. It was confirmed that Tremella preparation can improve the immune function of the body, enhance phagocytosis of macrophages, increase the content of immunoglobulin, so as to inhibit the growth of cancer cells and achieve therapeutic purposes.