Blueberries (Vaccinium species. ) belongs to Ericaceae. Blueberry is a kind of small berry, the fruit is blue, nearly round, the flesh is delicate, the seeds are small, the sweet and sour are moderate, and there is a pleasant fragrance. It can be eaten fresh, and can also be used as raw materials for food, beverage and medicine. Blueberry fruit is rich in various nutrients commonly found in fruits, as well as antioxidants and bacterial growth inhibitors such as anthocyanins and flavonoids. It is a fruit with high amino acids, zinc, iron, copper and vitamins. It has good nutrition and health care functions, including improving eyesight, eliminating eye fatigue, preventing brain nerve aging, resisting cancer, softening blood vessels, and enhancing human immunity. Its nutritional value is much higher than that of apples, grapes and oranges, and it can be called "the best in the world". Blueberry fruit not only has high nutritional value, but also contains a lot of substances beneficial to human health, including antioxidants (VA, Vc, VE), octanoic acid (vb), antibacterial components and rich dietary fiber. Generally speaking, it has the following health care functions: (1) VMA (anthocyanin pigment) of blueberry fruit has a good health care effect on eyes, which can reduce eye fatigue and improve night vision. ⑵ It has the functions of protecting capillaries and resisting oxidation. ⑶ Delaying brain aging and enhancing memory. ⑷ It has a good effect of eliminating inflammation in vivo, especially for urinary tract infection and chronic nephritis. 5] It has anticancer effect. The retail price of fresh fruit in the world is very high. The lowest retail price in the United States is about $3/kg, and that in Japan is as high as $ 40-50/kg. Fresh blueberries are usually packaged and sold in units of 125g. After harvesting, the packaging, storage, transportation, marketing and shelf life should be about 0℃, and the preservation period should be about 3 months. It is predicted that the export price of fresh blueberries produced in China will be above $5/kg. Blueberries that cannot be sold as fresh fruits in time can be quickly frozen into frozen fruits, and the export price is expected to be more than 2.5 US dollars/kg. Frozen fruits can be processed into preserved fruits, dried fruits, jams, drinks and so on. And additives for ice cream and dairy products.