Most of the coal seams in China are characterized by high gas and low permeability, and hydraulic fracturing and permeation technology plays an important role in unloading and increasing the permeability of coal seams. In order to improve the effect of gas extraction, combined with the geological conditions of 2-202 working face in Tenghui Mine, based on the principle of hydraulic fracturing to increase permeability, technical parameters and layout of hydraulic fracturing to increase permeability were studied, with its application effect. Practice showed that the use of hydraulic fracturing and penetration technology effectively improved the gas extraction effect of the working face, reduced the gas content in the recovery process and ensured the ventilation safety of the mine.