On the basis of discussing the connotation of gas drainage system diagram and the requirement of drawing, combined with LrGIS3.2 platform, the drawing method of gas drainage system diagram was discussed. The characteristics of drawing software and the definition of gas legend type were introduced, with symbol drawing and gas extraction system diagram legend library. Sijiazhuang Mine of Yangquan Mining Group was taken as an example, the drawing process and output form of gas drainage system diagram were introduced. Combined with the research and development of safety production operation and management platform, the development trend of drawing ore drawing by computer and expounds the importance of establishing the relevant contents and other standards in the drawing of gas extraction system drawing were introcued.