Purple-fleshed sweet potato(Ipomoea batatas L.) is an annual hebaceous plant within Ipomoea of Convolvulaceae. It is a highly nutritious vegetable that is rich in vitamins, minerals, dietary fiber and dietary carbohydrates. In addition to the listed nutritive components, purple-fleshed sweet potato contains large amount of anthocyanins, which have excellent biological properties. In this dissertation, the extraction technology of purple-fleshed sweet potato anthocyanins was studied, and then the composition...