The beta-carotene is a typical kind of carotenoid family, which is not only the important source of vitamin A, but also has a significant physiologic effect on the human being. The beta-carotene may prevent, improve and even cure some diseases and can also improve the immune function of human being. Meanwhile, this carotene is a kind of natural pigments with high prices, and it also acts as drugs, nutritional supplements or the supplements to foods, forages and cosmetics.