Abstract: An indoor soilcolumn experiment was carried out to study the effects of PAM application of different concentrations on the soil infiltration and salt leaching of the coastal dredger fill, in order to improve the hydraulic conductivity and accelerate the salt leaching of the coastal dredger fill. The results showed that the application of 0.05, 0.2, 0.3, 0.6, 1.2, 2.4 g/L PAM solution effectively improved the soil structure, significantly enhanced the capacity of hydraulic fill hydraulic conductivity and leaching desalination, reduced the value of pH and improved the soil moisture content for dredger fill. In the initial leaching, the higher the concentration of PAM solution was, the faster the infiltration rate of soil water was. The infiltration rate of soil water in the dredger fill decreased with time. After the water stability, the infiltration rate of the 0.6 g/L PAM treatment reached a maximum of 0.059 cm/h, which was 1.64 times of the control treatment. Soil salt contents of all the PAM applied treatments were less than 1.0 g/kg after 267 h continuous leaching, and all soils were non-saline soil. The soil salt content of the 0.6 g/L PAM applied treatment with 0.32 g/kg was the lowest, while the soil salt content of control treatment with 4.82 g/kg was in severe saline soil. The optimal application concentration for the anionic PAM with a molecular weight of three millions was 0.6 g/L to dredger fill in Tianjin coastal Area.