Water and soil losses bore a close relationship with the rainfall and the soil moisture before raining. The critical rainfall intensity for sloping field to produce surface erosion was 4 mm/10 min, and the critical rainfall 12.5 mm. The soil loss doubled as the rain-type rose one level from moderate rain to cloudburst soil erosion appeared.notably in direct proportion to erosive rainfall. The amount of runoff was in direct proportion but the quantity of soil loss in inverse proportion to 0-30 cm soil moisture factor before raining.