Potato starch is the main component of potato tuber dry matter,which is widely used in food,pharmaceutical,chemical processing and other industries.With the development of China's potato staple food strategy,more and more attention has been paid to the yield and quality of potatoes,and increasing the yield and quality of potato starch has also attracted more attention.This review summarizes the characteristics,synthesis and degradation pathways,the main appli-cations of potato starch and the effects of external conditions and internal factors on starch content.This paper aims to provid direction and theoretical basis for screening potato with high starch content germplasm resources and high starch breeding in future.