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The specific power has often been used in evaluating the influence of water droplet impact on soil surface. A Nelson R3000 rotating spray-plate sprinkler was selected and the drop size, drop velocity were tested under 100,150 and 200kPa by 2DVD.The relationship between drop kinetic energy and drop size, kinetic energy applied per unit drop volume and distances along the sprinkler, specific power and distances along the sprinkler were analyzed. Results indicated that there were proportional relation between the kinetic energy and drop size, and the maximum value of drop kinetic energy from test location increased with the distances along the sprinkler increased. At the same location from the sprinkler, the maximum and average values of drop kinetic energy decreased with the increase of working pressure. The kinetic energy per unit volume increased with the distances along the sprinkler increased, and the change between kinetic energy per unit volume and distances along the sprinkler met exponential function. At the same location from the sprinkler, the kinetic energy per unit volume decreased with the increase of working pressure. At the test location between 0~6m along the sprinklers, the specific power values were less than 0.02W/m2 and the differences were small when operating pressure values were set at 100, 150, 200kPa. At the test location from 6m to the end of the sprinklers, the maximum values of the specific power were 0.1172, 0.0827 and 0.0522W/m2, and the value of the specific power decreased with the increase of working pressure.