The monitor site planning involves all categories of fields, river basins and erosion types in Liaon- ing Province, and basins of Liaohe river, Daling river and Huntai river etc. are also considered. The types include sloping runoff field，hydrometric station and checking stands of small catchment，etc. . Our monitoring goal，the cause and modulus of soil erosion under different Land-use types，and total loss of soil and water in a watershed，primarily own to the sites, i, e.，all of the original data, such as silt，flow rate and rainfall come from the sites.