Abstract: To improve gas extraction efficiency in high gas content and low permeability soft seams, "fracturing-sealing"integration method is developed to fracture coal mass and improve seam permeability by using static blasting, "strong-weak-strong" borehole pressurized sealing technique, and then it was carried on engineering experiment in 2101 Mining Area of Changcun Coal Mine. The result shows that the average of drilling gas extraction efficiency increases from 29.5% to 62.5%, tunneling speed adds from 56 m/mon to 104 m/mon, both hectometer-borehole gas emission quantity and permeability coefficent in coal seam improve nearly double.