By maintaining the original conditions of undisturbed soil in typical profiles

tension infiltrometer(d=20 cm

h0=-5 cm)was used to measure soil infiltration under three different patterns of landuse in Qingmuguang karst valley. Results showed obvious differences in soil infiltration capability among three different patterns of landuse. Dryland behaved the best infiltration capability and wasteland

the worst. Unsaturated conductivity

stable infiltration rate

and accumulated infiltration in dryland decreased with soil depth

while the indicators behaved an opposite tendency in woodland. Furthermore

unsaturated conductivity

stable infiltration rate

and accumulated infiltration in the 15—30 cm soil layer were lower than those in the 30—45 cm soil layer in wasteland. Soil bulk density and soil porosity had significant correlations with the properties of soil infiltration

but initial soil water content solely significantly influenced initial infiltration rate

with the correlation coefficient being-0.825. According to the simulation infiltration experiments

an applicable result was achieved by Kostialov model in simulating infiltration process in karst valley under different patterns of landuse and the fitted value was 0.765.