Underground horizontal directional borehole in coal mine has more technological advantages than the conventional bore hole in gas drainage. This paper analyzed the gas control technology of working face in conventional borehole of Dafosi coal mine with the disadvantages being pointed out. Based on the analysis on the drilling technology and borehole arrangement of long directional borehole and the field application, the conclusion is that the directional borehole is good for the centralized regional gas drainage in the working face. The data of the gas drainage proves that the gas drainage efficiency of the directional borehole is better than the conventional borehole.