Selecting a suitable allowable sprinkler intensity is one of the important measures to avoid soil and water erosion under sprinkler irrigation conditions.Field experiments were conducted to determine the dynamic changes of soil crust thickness,surface soil bulk density and soil infiltration property with spraying duration under different sprinkler working pressures and nozzle diameters.The experimental treatments included two texture soils (loamy sand and silty clay loam),three sprinkler working pressures (103,138,and 172 kPa) and three nozzle diameters (3.97,5.95,and 7.94 mm).The results showed that the soil crust thickness and the bulk density of surface soil decreased with the increase of sprinkler pressure,while the steady soil infiltration rate increased.The greater the nozzle diameter was,the greater the soil crust thickness and the surface soil bulk density were,while the smaller the steady soil infiltration rate was.Soil crust thickness and surface bulk density increased significantly with the increase of spraying duration,while the steady soil infiltration rate decreased logarithmically.The specific power of spraying droplets was an optimal parameter to describe the impact of spraying kinetic energy on soil infiltration rate.The results provide a scientific basis for the determination of allowable sprinkler intensity.