Five kinds of purple sweet potato including Zishu-wang,Ziqing 2,Zijin 3,Nanzi 008 and Yuzi 263 were used as raw materials to produce purple potato sake through saccharification and batch feeding.Their wine-making characteristics were compared to determine the best one for Sake production.The results showed that Zijin 3,Yuzi 263 and Zishuwang had high content of nutrients and were suitable for sake production.Among them,wine-making properties of Zijin 3 were the best.