Abstract: The high level borehole gas drainage used in the Xiaoqing Mine has yielded highly desirable results. Introduced the principle of high level borehole drainage, the layout and specific parameters of diagonal borehole and the roof level horizontal borehole. And analyzed the effect of the factors that affect the drainage, mainly include the boreholes’ layout, location, and length, height of the fracture zone, the impact length of coal wall support, reasonably determine the location and parameters of boreholes, which will help to obtain good drainage performance on the adjacent layer and goaf gas drainage, is significant as the reference to the ascertainment and optimization of the subsequent gas drainage borehole parameters.