Abstract: In this study, the sea area of Changli Gold Coast National Nature Reserve was chosen as the study area.The correlation between the median size of sediments, the total amount of organic matter and the various occurrences of phosphorus was analyzed.The results showed that the total phosphorus (TP) content of sediment in the sampling area waters of the reserve ranged from 257.2×10^-6 to 470.2×10^-6 with an average of 282.4×10^-6.Among them, the contents of organic phosphorus (OP) ranged from 21.0×10^-6 to 191.4×10^-6.Inorganic phosphorus (IP) was the main speciation of phosphorus species in the sediments, with the content ranging from 106.2×10^-6 to 214.6×10^-6.The content of Fe/Al-P (Fe/Al-P) is 17.2×10^-6~55.9×10^-6.Calcium-bound phosphorus (Ca-P) is the dominant species of IP, with a content of 71.4×10^-6~168.2×10^-6.The content of Ca-P and its proportion are higher, and the risk of phosphorus release is lower.The spatial distribution of the content of phosphorus forms is basically the trend west > middle > east.Some samples relatively close to new openings have higher phosphorus content.The northern region is mainly affected by factors such as terrestrial input and hydrodynamic conditions, and the phosphorus content is low.According to the characteristics of statistical data, the sediment in this area is basically no pollution.