Compound polysaccharide is a polysaccharide extracted from natural fungi such as tremella, Flammulina velutipes, Lentinus edodes and plants such as Poria according to the basic principles of traditional Chinese medicine and the compatibility law of traditional Chinese medicine prescription "Jun, Chen, Zuo and Shi". After numerous repeated experiments, the most scientific and effective combination and ratio of polysaccharides were screened out to form composite polysaccharides, and their biological activities were highly complementary.

After repeated experiments and clinical screening, the active polysaccharides were compounded, and the varieties with high activity and complementary functions were screened out to achieve a more comprehensive and efficient effect. In the mutual proportion of various active polysaccharides, the best proportion combination with synergistic effect was found, which made the immune surface activated by compound polysaccharides more and the effect was more obvious.

Carbohydrates condensed from 2- 10 monosaccharide molecules are called oligosaccharides. Such as sucrose, maltose, lactose, etc. Saccharides condensed from more than 10 monosaccharide molecules are called polysaccharides. Polysaccharide is a macromolecular compound composed of several monosaccharide molecules, some of which are combined with peptide chains or other components. There are many kinds of polysaccharides, including glucose, fructose, galactose, rhamnose, xylose, fucose, arabinose and so on. For example, Hericium erinaceus polysaccharide contains four monosaccharides: glucose, fructose, xylose and arabinose.