In order to study the difference in hydraulic characteristics of different soil layers in benggang, soil-water characteristic curves of different layer soils were measured by using the high-speed centrifuge method, and a suitable soil-water characteristic curve (SWCC) fitting model was screened. Soil equivalent pore size distribution, soil specific water capacity C(θ), unsaturated conductivity K(θ), and soil water diffusivity D(θ) were calculated and then analyzed based on the selected SWCC model and soil hydraulic statistical models. Results showed that soils shifted from clay to sand gradually with soil depth increased. Among the frequently-used SWCC models, the Fredlund & Xing model was the optimal one for benggang. The model fitting parameters θ_s, α, and n decreased when soil texture changed from sand to clay. As the depth of the soil layer increased, the water holding capacity of the soil decreased. The values of C(θ), K(θ), and D(θ) were influenced by both soil texture and water content (or suction). In the low suction stage, these three indices changed gently with soil suction, and the values of C(θ) and K(θ) of sandy layer soils were larger than those in other layers; while the performance of D(θ) was the opposite, which were mainly controlled by macropores. In the high suction stage, all those indices of sandy layer soils decreased rapidly and were lower than other layers; the difference of K(θ) and D(θ) values between different layer soils become bigger and bigger with the suction increased, which was due to the clay adsorption and soil capillarity of micropores.