Tremella is an extremely valuable tonic. Modern medicine has proved that the main pharmacological active component of Tremella tremella is polysaccharide. Tremella tremella polysaccharide is the most important component of Tremella tremella, accounting for 60%-70% of its dry weight. At the same time, Tremella polysaccharide is also an important bioactive substance, which can enhance human immune function and strengthen the foundation. Tremella polysaccharide has no toxicity to the respiratory system, central nervous system, blood circulation system, heart, liver and kidney, and has no effect on the reproductive ability of mice and the survival rate of young children. At the same time, it has no acute or chronic poisoning in mice, no mutagenic, teratogenic and carcinogenic effects, and is a non-toxic substance.