Through analyzing the requirements of kilometers directional drilling rig feeding condition to feeding system and contrasting feed control of existing drill,a load-sensitivity feeding hydraulic system was designed for kilometers directional drilling rig using load sensitive principle.The feeding hydraulic system model of kilometers directional drilling rig was built by the system simulation software AMESim.The tests in laboratory and field show that there are no relation between flow and load in the feeding control system,and it is good at control performance,it can meet the operating requirements of kilometers directional drilling rig.It provides theory and methods for the drill design and test.