[Objective] The water conservation function of loess in different vegetation in the Loess depression of Zizhou County, Shaanxi Province was investigated in order to provide scientific basis for the allocation of soil and water conservation measure in this area.[Methods] This paper systematically studied the soil infiltration characteristics and its influencing factors under different vegetation of Loess Plateau, by using the field double-ring infiltration experiment and indoor soil particle size analysis.[Results] The stable infiltration rates of flat grassland, slope grassland, jujube forest land and apricot forest land in the study area were 1.91, 1.54, 1.47 and 1.56 mm/min, respectively. The stable infiltration rate of the silted corn plot from the upstream(sample plot A) to the downstream(sample plot F) plot was generally getting smaller, with a variation between 0.69 and 1.1 mm/min. Grassland and woodland had greater infiltration rates than silt corn plot. Fitting by the infiltration experience formula, the best fitting effect was the Kostiakov model, and the fitting effect of Horton model and the empirical general formula was general.[Conclusion] The soil infiltration rate of loess layer under different vegetation in the area is higher than that of the silted corn field, and the infiltration rate from the upstream to the downstream in the corn field is also gradually decreasing.