This study aimed to analyze the variation of soil physical and hydrodynamic properties of saline soil with different salinization levels, the experimental study was carried out in Xuwei New Area of Lianyungang City, Jiangsu Province. Five kinds of soils with different salinization levels were sampled and their pH, EC_e, bulk density, total porosity, water content and saturated hydraulic conductivity were measured. The changes of physicochemical parameters and hydrodynamic properties of coastal saline soils with different salinization levels were analyzed. The results showed that: (1) The soil EC_e of 0—50 cm profile of different saline soils first decreased and then increased, but the EC_e of 40—50 cm profile was larger than that of 0—10 cm profile. The changes of soil EC_e in 0—50 cm profile of non-saline soil and extremely heavy saline soil were small, and the EC_e value of 0—50 cm section of light saline soil, medium saline soil and heavy saline soil fluctuated greatly. (2) Soil EC_e was negatively correlated with bulk density, and positively correlated with capillary porosity, non-capillary porosity, total porosity, moisture content, capillary water capacity, field water capacity and maximum water capacity. There was a very significant positive correlation between soil porosity and water holding capacity. (3) The saturated hydraulic conductivity of extremely heavy saline soil was significantly lower than that of other saline soils, and the saturated hydraulic conductivity of 0—20 cm profile was greater than that of 20—50 cm profile. The results could provide a theoretical reference for water and salt management and ecological environment construction of coastal saline soil.