The effects of four different amendments on the physicochemical properties of salinealkali soil and the growth of maize seedlings were studied by pot experiments. The results showed that, after being treated with the four amendments, pH and watersoluble salt content of the soil were significantly reduced. In contrast, the contents of soil organic matter, available phosphorus, available potassium and alkalihydrolyzable nitrogen increased. The contents of CO₃^2-，HCO₃^-，Ca²⁺，Cl^-and Na⁺ in the soil decreased, and the contents of Mg²⁺ and K⁺ increased. The SO₄^2- content changed little. After comprehensive analysis, the effect of G₃was the best.