The invention provides a saline-alkali soil fertilizer which comprises humic acid, gypsum, microorganisms, domestic manure, a nitrogenous fertilizer, a potash fertilizer, a phosphatic fertilizer and a silicon fertilizer, aiming at solving the technical problem that a saline-alkali soil land is low in crop yield. The saline-alkali soil fertilizer has the advantages that the cost is low, the preparation is scientific and reasonable, the nutrition is sufficient and high in utilization rate, and the yield-increasing effect is remarkable; the saline-alkali soil fertilizer is particularly applicable to growth of saline-alkali soil crops, the saline-alkali soil land can be effectively improved, and guarantee is provided for farmers to increase the production and generate the income.