Abstract: In order to quickly and efficiently drilling in the narrow tunnel conditions of Yima Coal Mining Group, On the basis of the existing crawler drill, a full hydraulic crawler drill is developed. The domestic pump and valve are used to promote the application on the crawler rig, and the cleaning degree of the hydraulic system can be further improved with other accessories, and the service life of hydraulic components is prolonged. Through field industrial experiments, the narrow-body full-hydraulic crawler drill can be used to construct drill and advance pressure measured drilling, and has strong adaptability to multi-layer hole from - 90° to 90° angle in narrow alley, the coal seam of straddle conveyor, the adjacent coal seams and through beds holes construction.