Description: Sucker rod guide is a downhole tool for preventing eccentric wear of pumping Wells, which is suitable for pumping Wells with eccentric wear, especially for pumping Wells with eccentric wear above the neutral point of sucker rod and directional inclined Wells, and for those with eccentric wear below the neutral point of sucker rod and the nylon centralizer on the sucker rod body for better effect of eccentric wear prevention. Sucker rod centralizer has strong flexibility, it is in contact with the inner wall of the oil pipe, can reduce the friction between the rod and the pipe, enhance the oil extraction life of the pumping unit.