水土流失是受水力、重力及其他外力作用影响,水土资源及土地生产力受到破坏,进而影响生态环境与人们的正常生活。水土流失具体含有土地表层侵蚀与水损失。土壤侵蚀指土壤受到重力、风力及水力因素作用,被破坏并产生沉积的过程。主要论述了水流失的定义、土壤侵蚀的特征、水流失的危害、特点及土保和水保之间的关系。 Water and soil loss is affected by the action of water, gravity and other external forces, and soil and water resources and land productivity are destroyed, thus affecting the ecological environment and people’s normal life. Soil erosion specifically includes land surface erosion and water loss. Soil erosion refers to the process by which soil is damaged by gravity, wind and water and destroyed. Mainly discusses the definition of water loss, the characteristics of soil erosion, the harm of water loss, characteristics and the relationship between soil and water conservation.