According to field positional experiment materials of natural and artificial rainfall and the water brushing,remote sensing of soil erosion types,and sediment of Wangdong gully small watershed,soil erosion laws and sediment reduction benefit,especially runoff and sediment yield on hard surface were studied.It has been proved that runoff brush from farmland and hard surface of village is a main reason for gully head rapid extending,the gully-slope road erosion is an important factor limiting sustainable development of farm economy.Gully-slope development engineerings which were built by the help of experimental station,made gully-slope eco-environment gradually turn into fine circle,the gully slope of bare mountain far from village had been replaced by new scene with road nets and full mountain fruits,and turned into economic gully slope