Sediment benchmark refers to the actual allowable concentration of specific chemicals in the sediment that does not harm the quality of benthic organisms or overlying water bodies. It is not only a perfection of the water quality benchmark, but also the basis for evaluating sediment pollution and ecological risks. Basic elements of eco-environmental quality assessment. Research on sedimentary benchmarks abroad began in the 1980s, but a complete and unified sedimentary benchmarking system has not yet been formed. Due to the migration, transformation, and bioaccumulation of pollutants in sediments, and The complexity of the interface process still lacks key research methods. Many domestic scientists have done a lot of useful explorations, but the research is still fragmented, and no national authority has issued a lake sediment reference standard. What does this text mean? ['Urgent need to make up for the lack of existing sediment reference systems.', 'Sediment reference is very important but the system is not studied.', 'Sediment reference is an important research content of lake water environment.', 'There have been many advances in related research on sediment baseline.']