Abstract: In irrigated agriculture, people irrigate through the transformation of terraces and strip land; this irrigation methods are with function of water preservation, fertilizer, soil conservation role in ensuring that the high-yield crops. However, this irrigate method also brings many problems. To overcome these problems and shortcomings, through theoretical research and experiment proved, gentle slope zone in the Hexi Corridor in Gan su Province, longitudinal micro-water gravity irrigation is feasible.