Abstract:Peanut skin （PS）is consumed as the by-product of the production process of Peanut and its products.At present，most PS is treated as waste and only a part of PS is used in animal feeds and pharmaceutical products，which has caused a great waste of resources and environmental pollution.Studies have shown that PS contains a large amount of peanut skin procyanidins （PSPc），which is a kind of polyphenols widely found in plants.Peanut skin procyanidins （PSPc）is found in PS，which is a kind of polyphenols widely exists in plants.Some studies have revealed that PSPc possesses well antioxidant，anti-bacteria and hypoglycemic functions，thus it has broad development value and application prospect，as a naturally safe，green and healthy active substance.This paper summarized the lastest research status of physical and chemical properties，biological functions and extraction methods on PSPc and analyzed the existing problems and development strategies in the study of PSPc.It was of great significance to provide a theoretical basis and guidance about the rational exploitation and comprehensive utilization of PSPc.