How to analyze quantitatively the results obtained by comprehensive control benefit of soil erosion for well instructs of the soil and water conservation work is a topic worthy of along term study in Southern China. In 1995，comprehensive control in Daishui river valley was started to implement at Enshi experiment and monitoring station of soil and water conservation in Hubei Province. In 1996，a hydrology silt observation station was established and data of hydrology and silt was collected. Effects of comprehensive control were assessed quantitatively using statistical analysis of monitoring data for the 10 years.