Abstract: In this study,comprehensive evaluation of agronomic characters,nutritional components,processing quality and adaptation in eighteen purple sweet potato varieties were carried out.The results showed that Fushu No.9,F22-158,58009 and Jishu No.18 had the characteristics of fine exterior,high quality and palatability,which are suitable for being purple sweet potato edible varieties.Weixiang No.1 and Jishu 18 has such perfimance characters as fine exterior,high quality and palatability,which are suitable for purple sweet potato processing varieties.varieties is better suited for and anthocyanidin extraction.Further study on stem-leaf yield,sweet potato yield,leaf area coefficient and T/R value of sweet potato processing varieties,we founded that strengthening management in early culture stage for Weixiang No.1 were very favorable in obtaining a high yield,but extension growth period and prevention leaf drop were conducive to the high yield of Jishu No.18.