Two Fagopyrum tataricum varieties ‘Chuanqiao No.3’and ‘Chuanqiao No.4’were used as experimental materials, and the effects of different concentrations of NaCl stress on physiological traits of buckwheat seedlings were studied. The results showed that the plasma permeability of leaves in ‘Chuanqiao No.3’was significantly increased, while that in ‘Chuanqiao No.4’was not significant changed under the low concentration（50 m mol·L^-1） of salt stress, and the SOD activity of leaves in ‘Chuanqiao No.4’was significantly higher than that in the control, which indicated that the low salinity had promoting effect on SOD activity of leaves in ‘Chuanqiao No.4’. Under the high concentration（150 m mol·L^-1） of salt stress, the plasma permeability and MDA content of leaves in two Fagopyrum tataricum varieties were all significantly increased, and they increased more in ‘Chuanqiao No.3’. The roots vigor, activity of SOD and APX of two Fagopyrum tataricum varieties were all significantly decreased, and that of ‘Chuanqiao No.3’decreased more. It indicated that the salt tolerance of ‘Chuanqiao No.4’was obviously higher than that of ‘Chuanqiao No.3’.