The characteristics of soil anti-scourability and its primary influence factor in different land use types of Purple soil hilly region were studied.(1)The results showed that the sediment concentration had a decreasing trend during the process of scouring

but the traditional farmland's had a increasing trend from 7 to 10 minute.The sediment concentration were traditional farmland(0.81 g/L)>tree-crop intercropping land(0.73 g/L)> orchard(0.69 g/L)>bamboo forest land(0.58 g/L);(2)During the scouring process

the index of soil anti-scourability increased gradually along with the time

and the order of soil anti-scourability is that the maximal is bamboo forest land

orchard and tree-crop intercropping land were secondary

and the minimal is traditional farmland;(3)The index of soil anti-scourability were bamboo forest land(1.37 min/g)> orchard(0.99 min/g)> tree-crop intercropping land(0.92 min/g)> traditional farmland(0.70 min/g)

and the index of soil anti-scourability of bamboo forest land

orchard and tree-crop intercropping land is respective 1.96

1.41 and 1.31 times as traditional farmland;(4)Root system had obvious enhancement effects on Purple soil antiscourability

and the intensified values of soil anti-scourability by root system were bamboo forest land> orchard> tree-crop intercropping land> traditional farmland.