Abstract: In order to select a suitable variety for sweet potato juice,basic juicing performance of 15 varieties of sweet potato(Ipomoea batatas(L.)Lam.)were studied,including their indicates such as water content,starch content,soluble sugar content,reducing sugar content,total acid content,total protein content,juice yield after enzymolysis. Results showed that the water content,starch content,soluble sugar content,reducing sugar content,total acid content,total protein content,juice yield after enzymolysis varied between 52.5% and 80.3%,11.1% and 18.1%,1.76% and 13.56%,0.11% and 1.24%,2.46 and 6.99 g/kg,0.88% and 2.95%,39.8% and 77.9% respectively. Juice yield and starch content were used to be the main assessment index,XN 1448-5 was selected to the optimum one among the 15 varieties because of its high juice yield,lowest starch content,high water content,high soluble sugar content and total protein content.