Abstract: To study the properties of soil samples collected from Qian’an soil forest， two sampling points were chosen for vertical sampling and the dispersion identification was made. Based on the study of particle-size analysis and physicochemical analysis， the dispersion of the soil was determined by different identification methods， including pinhole test， crumb test and double-hydrometer test. The results showed that within the depth range from 0 to 1m， the silt particles account for a large proportion of the soil samples. The total soluble salt accounts for approximately 0.3% or above. The two sampling points display different change rules of the soluble salt. It is obvious that the shallow soils of these two sampling points are highly dispersive. At the first sampling point， the dispersion degree decreases with the increase of the depth， while it is not obvious at the second sampling point.

Key words: saline soil, physicochemical property, dispersion, pinhole test, crumb test