Abstract: Riparian soils surrounding Poyang Lake were stratified collected for phosphorus adsorption kinetics study and the experiment of isothermal adsorption. The results of this experiment were then analyzed and fitted. It shows that, the concentrations of soil total phosphorus from different riparian zones varies greatly (F=7.103, p<0.01). The content of total phosphorus in riparian soil of the Gan River entrance is significantly higher than those of other riparian soils. Meanwhile, total phosphorus content of at the 0~20 cm depth (635 mg·kg^-1) is higher than that at the 20~40 cm depth (393 mg·kg^-1). Phosphorus adsorption kinetics in different riparian soils have similar trends. During 0~2 h, soils quickly adsorbed the phosphorus in the solution; during 2~24 h, the adsorption of phosphorus in soils decreased; after 24 hours, the tendency of phosphorus adsorption gradually flatted. The maximum value of equilibrium adsorption capacity (Qe) is 216.0 mg·kg-1. The isothermal adsorption fitting degree of Langmuir model for phosphorus is 0.951~0.995, which indicates that the maximum adsorption capacity (Qmax) of surface soils is higher than that of the subsurface soils. Soils from the Rao River entrance have the largest amount of adsorption (629.12 mg·kg^-1), while soils from the Thornhill have the smallest amount of adsorption (340.72 mg·kg^-1). The equilibrium phosphate concentration (EPC0) of the surface soils in the riparian of Poyang Lake is less than 0.1 mg·L^-1. So the risk of phosphorus loss is small. The buffering capacity of exogenous phosphorus in the eastern riparian soils is better than that of the southwest riparian soils. Last but not least, the maximum adsorption capacity is positively correlated with TP.