When mining deep coal seams, the coal has low permeability, high gas pressure and difficult gas extraction beforemining, which seriously restricts the safe production of coal mining enterprises. In order to improve the gas extraction efficiency of low permeability coal seam in deep mine and prevent the risk of coal and gas outburst, a coal seam antireflectionscheme using drilling hole along seam high-pressure hydraulic slotting technology is proposed, and this technology is appliedto the 15 - 16-24130 working face of Pingdingshan No. 10 Coal Mine. The results show that after the implementation of hydraulic splitting, the gas flow in the drilling hole is greatly increased, and the gas flow in the inspection hole with the smallestchange is increased from 0. 08 m3 / min to 0. 12 m3 / min, an increase of 50% ; When the spacing of high-pressure hydraulicslotting holes is 8m and the hydraulic split radius is 1m, the influence radius of split holes is 4 m; After high-pressure hydraulic slotting, the coal seam permeability at 1. 5 m and 4. 0 m away from the split hole is 2. 76 m2 / ( MPa2· d) and1. 28 m2 / ( MPa2· d) respectively, which is 145. 3 times and 67. 15 times higher than that before splitting.