Phosphorus release kinetics characteristics of 15sediments from reservoirs in the coastal saline areas of Tianjin were studied through release kinetic experiments, and the relationship between the sediment composition and their phosphorus release characteristics was investigated. The results indicated that rapid desorption of phosphorus occurred in 0to 2hours, then repeated adsorption and desorption in 2to 12hours and gradually reached equilibrium in 12to 24hours, and the amount of phosphorus desorption reached maximum, which ranged between 8.01and 12.62mg/kg. Phosphorus release kinetics could be better described by pseudo-second order kinetic model. The phosphorus release kinetic characteristics of sediments are related to their composition, and have highly significant positive correlations with the content of total phosphorus and total iron, and have significant positive correlation with the content of clay; while the relationship with the total salt content is significant negative. In conclusion, phosphorus release from sediments in the coastal saline areas of Tianjin is closely related to the content of total phosphorus, and comprehensively affected by the content of total iron, total salt and clay.