carrots can be described as a treasure house of nutrition, rich in various vitamins (vitamins A, B, C, D and E), especially rich in beta carotene, and the average orange type contains 5-1mg/kg of beta carotene. Beta carotene is the main source of vitamin A, which is formed after hydrolysis. It is an indispensable vitamin for human body. It can promote growth and development, maintain normal vision, prevent and treat night blindness, dry eye and upper respiratory diseases, ensure the health of epithelial cells, and prevent and treat the occurrence and development of various types of epithelial tumors. Other types of carotene and carotenoids, as natural organic macromolecules, can also scavenge oxygen free radicals and enhance the efficacy of human immune system. In addition, it also contains a lot of soluble sugar, cellulose, protein, anthocyanins, mineral elements and pectin. At present, carrot has been regarded as a healthy functional food.