The contents of total phenolics,chlorogenic acid,flavanols and proanthocyanidins in nine apple varieties were an-alyzed during the fruit development.The results pointed to great quantitative differences in polyphenols composition and con-tents in the flesh of various apple varieties.The contents of total phenolics,chlorogenic acid,flavanols and proanthocyani-dins in apple fruit fell sharply during early stage of development ,and then decreased slightly or inclined to constant.The main polyphenol in early fr...