This research aimed toexplore the influence of soil aggregatecomposition，stability，organic carbon content andmicrobial number under different screeningmethods，and optimize the aggregate screeningmethods.Black soil was taken as theresearch object，four treatments with different screening methods were setup，including dry screening of drysoil，wetscreening of drysoil，dry screening of moistsoil，and wet screening of moistsoil.The advantages and disadvantages of these screening methods werecompared.The results showed that soil aggregates with particle size ≥ 2 mm of the dry screening of moist soil treatment wasabout 85.97% higher than that of the wet screening of dry soiltreatment.While for the aggregates inthe particle size of 2-0.25 and ≤ 0.25mm，the wet screening of dry soil treatment had the highest proportion and was about 80.90% and 91.82% higher than those of the moist soil of dryscreening，which were thelowest.The content of ≥ 0.25 mm water-stableaggregate(R 0.25)reached the highest value of 99.35% under the dry screening of moistsoil.The higher thevalue，the better the stability of soil aggregate and the stronger the soil corrosionresistance.The distribution of soil organic carbon in each particle size aggregate was onaverage under the treatment of wet screening of drysoil.The number of soil bacteria and actinomycetes was the highest under the wetscreening of dry soiltreatment.However，the number of soil fungi under the treatment of dry screening of moist soil washigher，which was significantly different from the three treatment methods of wetscreening of moistsoil，dry screening of dry soil and wetscreening of drysoil.To sumup，it is found that the stability of soil aggregates is better and the number of soil microorganisms is higher under the treatment of wet screening ofdrysoil，which plays an optimization role in soil structure and soil quality to acertainextent.