Abstract: According to the adsorption theory of grain, the equilibrium moisture contents of maize that had been added in 0, 0.5%, 1.0% and 2.0% of NaCl solutions at the temperature of 20℃, 30℃ and 40℃ are measured using the method of static-adjusting ambient humidity. The effect of concentration of NaCl solution, temperature and equilibrium relative humidity on the equilibrium moisture content of maize was analysed. Using modified Henderson model, modified Oswin model and Chung-pfost model, the equilibrium moisture content curves of maize added in different concentration of NaCl solutions were fitted, and a final mathematical model depicting equilibrium moisture content of maize added in different concentrations of NaCl solution was established.