Abstract:Procyanidins usually exist in natural plants such as peanuts and grapes，and are the polymerized form of flavanols. Because of their excellent antioxidant capacity，as well as anti-cancer，anti-inflammation，antiallergy and other biological activities，procyanidins are widely used in the treatment of many diseases to decrease hyperglycemia，inflammation，allergy，hyperuricemia.They also have great potential in the treatment of Alzheimer＇s disease.In this paper，the main physiological functions and efficacy of procyanidins and the existing analysis and identification methods were introduced in detail.