Soybean and maize seeds were selected as experiment material.The effect of different types salts stress and calcium on the seeds germination has been researched.The results showed that seed germination inhibition under alkali salts were significantly greater than neutral salt.Applied calcium could effectually improve the activity of α-amylase and protease and the soluble carbohydrate content,alleviate organic matter decomposition process of seeds under salt stress.Further,applied calcium could improve the germination rate,the length of root and shoot,biomass and water content under salt stress.This alleviation under alkali salts stress was more significant,and more obvious to the salt sensitivity of legumi nous plant.