Abstract: Gas drainage in high gassy coal seam with low gas permeability is always an hard solved significant technology problem in the process of safety production.Inspection and analysis of the results of the experiment of deep hole pre-split explosion strengthening discharging gas in high gassy coal seam with low gas permeability,the study discussed the radius of effection of the pre-split explosion, coal seam gas drainage efficiency and so on. Through the test of prodution practice,this measure realize the goal that this technology improved the speed of seam gas drainage, prevented and controlled of mine gas and coal outburst and ensured safety during production.