Based on runoff plot monitoring for different measures,the Sanchahe small watershed with the typical black earth in Binxian County,Heilongjiang Province was chosen as a research object.Six plots which include buffer strips,shrub barrier,contour cultivation,horizontal pit(planting tree in pit),denuded land and the ridge along slope were observed for two years.Results show that the amounts of soil erosion by horizontal pit,shrub barrier,contour cultivation,buffer strips,and the ridge along slope are reduced by 99.14%,97.65%,90.66%,87.7% and 58.72%,respectively,compared with denuded land.The horizontal pit is the best of all the soil and water conservation measures,whereas the ridge along slope is the worst.Runoff curve numbers are calculated for different soil utilizations.The study has provided a scientific basis for comprehensively preventing soil and water loss,choosing measures and protecting ecological environment in the future.