Abstract: The implementation of river（Lake）shoreline demarcation is not only an important content of implementing the reform of ecological civilization system in China,but also an important guarantee for the full implementation of the river（lake）leader system. Due to the unclear boundary of most river and lake management boundaries,some river and lake management and protection boundaries have been arbitrarily occupied,which interferes with the normal water management order and destroys the river and lake ecological environment. By studying the relevant documents such as national and local rules and regulations,analyzing the ideas of other provinces to determine the demarcation standards,and based on the situation of Jiangxi Province,this paper puts forward the river and lake demarcation standards.The river and lake demarcation standards in Jiangxi Province are determined separately according to whether there is a dike or not. With reference to the management regulations and standard requirements,rivers and lakes with embankments are divided into three grades:Grade 1～2,grade 3～4 and grade 5 according to the dike grade. Rivers and lakes without embankments are mainly determined according to the historical highest flood level or design flood level.The determination of river and lake demarcation standards lays a working foundation for river and lake demarcation in the province,and also has a reference value for river and lake demarcation in China.