Biologic measures can improve the landscape environment and solve ecological problems. It is an important method in alleviating soil erosion and agricultural non-point pollution. This article mainly studied the changes of soil physical property, runoff and soil erosion under hedgerow systems, and also discussed the corresponding mechanism of water and soil conservation. We discovered that micro-physiognomy and gradient changes under all the three kinds of hedgerow systems is in the order of Vitex neg undo > L eucaw na leucocep hala > Coriaria sinicathe; and the bulk density, the saturated hydraulic conductivity and the infiltrate ratio changes obviously under different hedgerow system and sampling location. Each Hedgerow system can reduce effectively runoff and soil erosion, which is in the order of the tectorial hedgerow without ploughs> the hedgerow > the traditional system. The hedgerow can reduce the soil erosion more obviously than runoff.