Rice was soaked into the different concentrations of SA,then cultivated in agar agar under two concentrations of NaCl by 50mmol/L. A research was conducted to test several physiological indexes of rice in the period of 3 leaves 1bud. Results indicated: Compared with the blank, the content of chlorophyll in the young leaf increased ,the activity of peroxidase improved,conductivity decreased and the content of MDA reduced. In addition,among the treatments,0.1g/L SA was the most effective on the resistance un...