To the soil microorganisms,soil nutrient and soil soluble salt of Yulin aerial seeding forest as the object of study,research on the variation law of forest soil soluble salt and the correlation to soil nutrient and microorganism,in order to provide a theoretical basis for the sustainable utilization of water resources and the improvement of forestation effect by aerial seeding effect.The results show that the study area soil genus sulfate type,soil layer distribution is not significant,the soil is still at the primary stage of development.In the soil surface,moderate reduction of chlorine ion can promote the growth of bacteria in soil.Soil salt and nutrient correlation is not obvious,appropriate concentration of potassium ions increase can be benefit to fungus survival and biomass accumulation.While additional 1 gram of potassium ions the number of fungi will increase by almost 14 in 1 kg.In the soil layer of 0-40 cm,soluble salt presents surface aggregation phenomenon in the uplink process,meanwhile,the salt present surface aggregation phenomenon in the middle of soil layer.The increasing of Na⁺ and HCO₃^- contents is favorable to the increase of total soil nitrogen content and the HCO₃^- is of the most obvious influence in the bottom of soil layer.