Utilization methods influenced aggregation degree of microaggregate of purple soil , the aggregation degree were in such order : grassland > forestland > garden plot > cropland , aggregation degree of microaggregate in soil developed from jas group was least , and that of j3s group was maximal 紫色土微团聚体团聚度受利用方式影响较大,团聚度次序表现为草地林地园地耕地,沙溪庙组发育土壤微团聚体的团聚度最低,遂宁组最高。