A method for improving the salt resistance of maize for growing thereof on saline soils includes treating the maize with a biologically active substance. Presowing soaking of the seed in sodium salt of 6-methyl-2-mercapto-4-hydroxypyrimidine with a concentration of 10-7...10-4 M in the course of 12-24 hours and spraying the plants at the beginning of the stage of panicle earing thereof with an aqueous solution of sodium salt of 6-methyl-2-mercapto-4-hydroxypyrimidine with a concentration of 10-7...10-4 M are carried out.
