In order to solve the low permeability and gas drainage in 1166 working face of Yueliangtian Mine, study on hydraulic fracturing technology was conducted, the feasibility of improving gas drainage efficiency and permeability of low permeability coal seam were analyzed. Based on analysis of hydraulic fracturing model and geological condition of the mine, 15 MPa  as initiation pressure in 1166 working face by calculation. After the fracture, the maximum gas drainage of single hole achieved 0.164 m3/min, maximum gas drainage content 63.9%,both improved by more than1.9 times and 2 times after fracture, with low damping coefficient, improving the gas drainage rate.