Infiltration,as one of the fundamental physical properties,is closely related to many processes including rainfall-runoff,soil erosion and non-point pollution.It is critical to measure soil infiltration rate quickly and accurately.Soil infiltration rates were measured using four methods of double-ring,single-ring,disc permeameter,and Hood infiltrometer on the loess-derived soil with planted soybean at the Ansai Research Station of Soil and Water Conservation,which is located in the hill-gullied area of the Loess Plateau.The results were evaluated based on the measured steady infiltration rate by double-ring method and saturated conductivity by Hood infiltrometer.The results showed that the steady infiltration rates of single-ring,disc,and Hood methods were 116%,111%,and 225% of that of double-ring method,respectively.The saturated conductivities of double-ring,sing-ring,and disc method were 65.8%,75.1%,and 105% of that of Hood method,respectively.The times of reaching the steady infiltration were quite different,approximately 100,80,and 30 minutes for double-ring,single-ring and disc method,respectively.The disc permeameter was more suitable to measure soil infiltration on hillslope for not only the savings in time,labor and water,but also the accuracy in estimating the steady infiltration rate and saturated conductivity.