Soil conservation in the 21st century demands the support of info mation technology.China Management Information System of Soil and Water Conservation,a state practical information system,is to be built.The system will provide information service and decision-making support for decision-making and scientific management of soil and water conservation for the state and local governments through collecting and fast processing of various soil water loss data.The system will be composed of 7 subsystems as:data management,file management,decision-making support, planning and design,dynamic monitoring and information processing,computeraided decision making and data communication.The system,has the functions such as information service,computeraided decision-making on soil and water conservation,planning and design of soil and water conservation,as well as information delivering.