Abstract: Aiming at the problem that it is difficult to accurately locate the borehole for gas drainage in coal mine, this paper analyzes the common borehole location methods currently used in coal mines, discusses the main problems existing in these methods, and proposes the spatial visualization borehole projection location technology. In this paper, the technical principle, algorithm research, technical characteristics and technical innovation of spatial visualization drilling projection positioning technology are described in detail, and the technical feasibility is analyzed, this technology can solve the problem of quickly demarcating the hole position, dip angle and azimuth angle of the gas drainage boreholes in different areas of outburst prevention measures, the method can realize the projection and calibration of multiple boreholes at one time, avoid the error caused by manual calculation and setting-out, and save the positioning time of boreholes in drilling field. The research results show that the time of demarcating a drilling site by the technology of visual borehole projection location in underground space of coal mine is not more than 30 minutes, which is 80% higher than the traditional method in time effect.