Abstract: Aimed at the main coal producing areas of Yunnan Qujing city, we select main mining area to measure coal seam gas basic parameters, respectively analyze gas pressure and gas content of coal seam and other basic data, investigate hydrogeological conditions of the mining area, and then analyze gas occurrence condition from hydraulic transport dissipation function, hydraulic seal function and hydraulic block function three main aspects. We obtain the influence of hydrogeological conditions on gas occurrence in Qujing Mining Area.