[Objective] The temporal variations of soil steady-state infiltration rate under typical cultivated lands were studied and the potential factors causing those changes were explored in order to provide theoretical bases and data support for soil erosion control, soil and water conservation, and the utilization of limited water resource in the Loess Plateau. [Methods] Using two-ring infiltration experiments, the temporal variations of soil steady-state infiltration rate under typical cultivated lands were studied. [Results] The temporal variations of soil steady-state infiltration rate under typical cultivated lands fluctuated significantly over time and displayed different temporal patterns(p < 0.05). Significant differences in soil steady-state infiltration rate were found between croplands and a bare land(p < 0.05). Among the croplands, the maximum mean soil steady-state infiltration rate occured at area planted with potato, and followed by a soybean land, and a millet land. The temporal variations in soil steady-state infiltration rate were closely related to agriculture activities, dry bulk density, total porosity, and root growth. [Conclusion] The temporal variations of soil steady-state infiltration rate under typical cultivated land displayed significantly different temporal patterns during one growing season(p < 0.05), which was mainly affected by agriculture activities, dry bulk density, total porosity, and root growth.