Abstract: According to two major problems including aridity and water and soil erosion, water storage pit irrigation method suitable for orchard irrigation was put forward. Water infiltration of water storage pit irrigation is under varying-head conditions. Through indoor experiment, vertical infiltration parameters in different heads were studied. The results show that infiltration head has significant effects on infiltration coefficient, and the infiltration coefficients vary alternately between relatively-stable and obvious variation as infiltration head increases; and infiltration head has less effects on infiltration index. The research results have an important value for further study of varying-head infiltration and soil moisture characteristic of water storage pit irrigation.