Abstract:Pectin，a plant polysaccharide is ubiquitously found in cell wall.In the production，pectin is often made into additives，which have important value in the food，medicine，chemical industry and other industries.At present，the raw material source of domestic pectin production is relatively single mainly from apple pomace and citrus peel，and the production efficiency is low.New applications of pectin continue to develop，making pectin extraction and commercialisation as one of the most attractive research.Potato residue is the main byproduct of potato starch processing，which is rich in pectin and has great development potential in pectin production.This paper focuses on the extraction method，structural characteristics，biological activity and application prospect of potato pectin，and provides theoretical basis for discussesing the physiological function and mechanism of potato pectin polysaccharides.