Five hundreds and fifty-seven varieties were inoculated with two sweet potato bacterial wilt (Ralstonia solanacearium) strains at seedlings in pot and field,and 31 varieties were selected showing resistant to both strains.Following inoculated with fusarium wilt fungi (Fusarium oxysporum f.sp.batatae),16 of 31 varieties showed resistant to both bacterial wilt and fusarium wilt diseases.Comparing with major variety Xiangshu75-55 in Fujian,seven varieties of them showed similar resistance to two diseases,but more resistant to bacterial wilt diseases than that to the other disease.They were Quanshu 860,Quanshu854,Jinshan93,Rongxuan 416,Jinshan 908,Guangshu88- 70 and Quanshu853.The four control varieties of Fushu87,Linsi No.2,Jinshan57 and Zhan 93-16 have single resistance to one disease or one strain.