Purple sweet potato is a variety of sweet potato,with excellent nutritional and medicinal value,which greatly promote the purple potato in the domestic and international of planting industry and product processing technology development. In addition to ordinary sweet potato contains nutrients,purple potato is also rich in anthocyanins,polysaccharides,flavonoids,chlorogenic acid,chlorogenic acid and selenium and other functional ingredients. Because of its rich functional ingredients,purple potato has been processed into many kinds of nutritional and healthy food. Purple potato,as a raw material,vigorously strengthens the beverage category,alcohol,milk,the whole powder,and long-term consumption of purple potato or purple potato products,can delay human aging,inhibit tumorigenic carcinogen production,beneficial to the growth of probiotics,lower blood glucose and lipid levels,inhibit harmful bacteria,improve liver function. The functional ingredients of purple potato have become the focus of food development and research at home and abroad. This article will make a key overview of this,aimed at providing a reference for purple potato further research and development.