Indoor culture experiments were used to study the effects of corn stover and aluminum sulfate on the pH value，soluble salt content and cation exchange capacity of soda saline-alkaline soil to provide the theoretical basis for the rational improvement and utilization of saline-alkaline soil.The result indicated that the pH value of soda saline-alkaline soil decreased at varying degrees after adding corn stover and aluminum sulfate.When the addition amount of aluminum sulfate was 0%～0.8%，the pH value of soda saline-alkaline soil was decreased sharply with the increase of the amount of aluminum sulfate.When the amount of aluminum sulfate was greater than 0.8%，the changes of pH value were slower.When the amount of aluminum sulfate was the same，the addition of corn stover could also slightly reduce the pH value of soda-alkaline soil.Combined the function of corn stover and aluminum sulfate，the contents of sodium ion，potassium ion，calcium ion and magnesium ion in soda saline-alkaline soils were all increased.The contents of carbonate ion and bicarbonate ion were decreased gradually with the addition of corn stover and aluminum sulfate.The addition of corn stover and aluminum sulfate also increased the cation exchange capacity of the soda saline-alkaline soil.The cations were replaced by the sodium ion on the soil colloid，and finally the exchangeable sodium percentage of the soda-saline-alkaline soil was decreased.In summary，under test conditions，15% corn stover and 0.8% aluminum sulfate have the best improvement effect on soda saline-alkaline soil.