Abstract: Four tomato rootstock varieties( ZJ-1，ZJ-3，ZJ-7 and ZJ-9)were selected as rootstock and Zheza203 was selected as scion to investigate the graft compatibility and the resistance to tomato bacterial wilt．The results showed that ZJ-1 and ZJ-9 were the best rootstock for disease-resistance，which had higher graft compatibility with Zheza203 and whose grafting survival rates were more than 99％．After the inoculation of three Ralstonia solanacearum isolates respectively, the grafting survival rates were 97 ．4％ and 97 ．8％ when Zheza203 was grafted with the stocks of ZJ-1 and ZJ-9，while only 75．0％ of
Zheza203 could survive without grafting，showing significant difference．After grafted with ZJ-1 and ZJ-9，the disease plant rates of Zheza203 were lower than 5％，significantly lower than 21．4％ of the control Zheza203 without grafting．Meanwhile，the yields of the grated combinations(ZJ1-203 and ZJ9—203)were increased by 92．2％ and 101．7％ respectively，compared with Zheza203 without grafting．In addition, the grafting seedlings of ZJ1—203 and ZJ9—203 had strong growth and had no effect on the fruit quality．

Key words: tomato, rootstock, scion, disease control by grafting, bacterial wilt