Abstract: Simulated rainfall was used to study the water erosion rule of disturbed sandy soil under different slope, different rainfall intensity and different vegetation coverage conditions. The results showed:(1)The runoff increased along with the increasing slope gradient. There was a critical erosion slope between erosion amount of sandy soil and slope gradient. When rainfall intensity was lower than 80 mm/h, the critical erosion slope was between 20° and 26.5°.(2)When the rainfall amount was set, runoff amount increased as the rainfall intensity increased, while the precipitation infiltration amount decreased as the rainfall intensity increased.(3)Vegetation can greatly reduce runoff and soil erosion.