Because of specific natural environment,social condition and important place of pastural area,the features and causing reason of soil erosion are particular. Along with pastural environment degredation ,government of all levels must pay attention to soil and water loss as soon as possible.Through analysing condition of soil and water loss,character and causing reason ,combined with natural and social conditions,the significiance and urgency of soil and water conservation for pasture are disscused.The princinple,measures of soil and water conservation for pasture are put up forward,and aims to abtain sustainable development in pastural area.