Abstract: Soil and water loss monitoring is an important basis for soil and water conservation, but it's still in initial stage in China. Although new technology and methods keep springing up, the quantitative criteria for soil and water loss are out-dated. Therefore, on the basis of simple analysis of monitoring contents,indexes and methods of typical small watersheds and using several monitoring methods in combination, including remote sensing, plug drilling and runoff plot monitoring and control station observation, we coupled the correlations among the multifarious methods by mathematical model, realized integration of the corresponding monitoring data and finally achieved the accurate estimation of soil erosion amount of typical small watersheds. Combined with the quantitative technology of soil and water loss, we introduce the basic monitoring system, soil erosion quantitative monitoring system and soil and water loss forecasting model of small watersheds, and then illustrate the quantitative monitoring methods for different soil and water conservation measures, which can provide references for the follow-up comprehensive treatment of typical watersheds.