In order to improve the permeability and extraction volume of coal seams in high gas and low permeability mines，a directional long borehole hydraulic fracturing technology is proposed，and a three hole fracturing process is designed，including one-time three-stage fracturing，integral fracturing，and one-time two-stage fracturing. After one month of fracturing，the gas concentration in all three holes exceeded 90%，and compared with before fracturing，the gas content in the three holes increased by 10%，30%，and 60% respectively. Compared with the end of the fracturing process，there were increases of 75%，75%，and 90% respectively. Compared with the negative pressure of 15 kPa during extraction，the gas flow rate increased by about 20 times when the negative pressure was 20 kPa，indicating a better gas control effect.