By the analysis on the main technical parameters of CS1000P6L drilling rig, it is thought that core drilling construction is feasible in 0°～45° angle range; after further study on the power head, a main part of the drilling rig, a specific project was selected for the application experiment, the problems found in the course of the experiment were carefully analyzed and solved, so then the performance reliability of the drilling rig working under the conditions of 0°～45° angle was verified. Through the analysis on related matching facilities for horizontal hole construction, not only the operation platform and the drill pipe & drilling tools setting were arranged but also the displacement control of the rig was solved.Practice has proved that CS1000P6L drilling rig can realize core drilling operation in 0°～45° angle range.