The derivatives of plant proteins are generally prepared by chemically modifying the side chain or the end of the protein by introducing other groups. The relative molecular mass of hydrolyzed plant proteins (peptides) is about 1000-30,000 Da, which have good physiological activity and can be easily absorbed by human body. Many natural plant active proteins have high affinity for skin and hair, are easily absorbed, can improve the moisturizing property of skin, give elasticity to blood vessels and tendons, and have the functions of nutrition, film formation, prevention of aging and promotion of regeneration.