A long-term stationary experiment was carried out in the field, to study effect of mulching the field with wheat-straw on amelioration of salinized aquic-fluvial soil. The result show that the measure increased contents of organic matter, nitrogen, phosphorus, potassium and other nutritious elements in the soil and meanwhile decreased soil pH, suggesting that it helps improve physical properties and speed up desalinization of the soil. It also reduced water evaporation, thus efficiently conserving soil moisture and preventing salt from accumulating to the surface layer of the soil. Besides, it also built up soil fertility for normal growth of the crop, corn, thus enabling an increment in yield by 1470 kg/hm² or 16.20% over the crop in CK.