This paper analyzes the gas-geology principle in Ⅱ88 mining area in the Luling coal  mine of Suzhou in Anhui Province, and establishes the kinematic model and the pressure gradient calculation model. The Luling coal mine is controlled by the Xusu arc structure and duplex thrust that make the stress more concentrated, the gas pressure and gas content bigger, and the outburst disaster risk more serious than other mines in the Sulin mine area. In sequence, the 8th coal seam is the thickest stable coal seam developed near the maximum flooding surface, so the trap effectiveness of its roof and floor is good and the coal gas is accumulated.