Abstract: With the increasing of salt content of saline soil in inshore,the difference between water content and salt-solution content is remarkable,resulting in the dry density increasing,and the void ratio and degree of saturation decreasing.On the basis of the conversion of physical indexes and the experimental results of particle size analysis,it has been showed that content of clay group and silt group increases,and colloid group decreases with the increasing of salt content,starting from 2% of salt content.And upper groups(≥25 μm) cannot be effected with the increasing of salt content.Starting from 11% with the increasing of salt content,solid particles are formed from salt crystals,causing the plastic index of the soil drop gradually and presenting an appearance of sections.