Abstract: The middle inclined directional wells pipe rod and tube eccentric wear is the main influencing factor of tubing leakage and sucker rod breakage in Jidong oilfield, which shortens the pump inspection period,increases the oil well maintenance workload and increases the production cost. By means of mathematical statistics, the main influencing factors, such as well inclination, punching time, subduction and water content,which influence the eccentric wear of rod and pipe in the well with medium inclination are analyzed, and the technical limits of the eccentric wear of rod and tube caused by various factors are determined. By using the weighted lever to improve pole bearing structure, the deviation is greater than 35°by wear-resisting lining pipeline of oil wells, optimizing production parameters of lower stem tube eccentric wear degree, to further improve the slope of well tube rod eccentric wear prevention technique. Since the popularization and application of this technique, the average single well inspection pump cycle has been extended by 250 d, and the production and maintenance costs have been reduced by 5×104 yuan/well times, thus providing an important technical support for a long-term stable production of oil wells.