Black tea is rich in carotene, vitamin A, calcium, phosphorus, magnesium, potassium, caffeine, isoleucine, leucine, lysine, glutamic acid, alanine, aspartic acid and other nutrients. Black tea in the fermentation process of polyphenols chemical reaction of fresh leaves in the chemical composition of the larger changes will produce theaflavins, tea and other ingredients, the aroma than the fresh leaves significantly increased the formation of black tea unique color ,taste.