Abstract: Eight main nutrition compositions and eating quality of 211 sweet potato varieties in germplasm resource were determined.Having analysed the correlation and stability of different compositions data in sweet potato germplasm,it was found that,some compositions such as dry matter content,starch content,soluble sugar content,rough cellulose and Vitamin C have remarkably correlativity.Dry matter content,soluble sugar content,rough cellulose and carotene content were more stability than soluble sugar,rough protein,rough fat and Vitamin C in different environment,we also selected 100 varieties which have preferable nutrition compositions.