We irrigated Distylium buxifolium with different concentrations of NaCl solution(0,80,100,200,300 mmol·L^-1),to evaluate salt-tolerance by indexes such as rate of injured area,relative water content,relative conductivity,chlorophyll content,malonicaldehyde(MDA) content,superoxide dismutase(SOD) activity,catalase(CAT) activity.Furthermore,the responses to moderate salt stress(100 mmol·L^-1 NaCl) of D.buxifolium(D) and its cultivars(D1,D4,D6,D7,D10,D13) were also compared.The results showed that:(1)The morphological and physiological indexes of D.buxifolium changed significantly under different salt concentrations.After 15 days,only those irrigated with NaCl solution below 100 mmol·L^-1 were still alive.(2)Under moderate salt stress(100 mmol·L^-1 NaCl),the rate of injured area of D1 and D13 is significantly smaller than that of other cultivars and the difference in all these indexes of D.buxifolium and its cultivars is significant.Meanwhile,the physiological response of D1 and D13 showed that the salt tolerance of these two cultivars might be higher than that of others.(3)The method of fuzzy cluster was used to evaluate the salt tolerance among different cultivars,which showed that the salt-tolerance order was D1>D13>D>D7>D10>D4>D6.Therefore,it is not appropriate to plant D.buxifolium in the area where salt concentration is above 100 mmol·L^-1.In light and moderate salinized areas,D1 and D13 would be the priority selections.