Abstract: According to the harmful gas content over limit problem occurred during the No.63low04 auxiliary gateway driving along goaf, with the analysis applied to find the harmful gas sources and the gas emission channel, the constant pressure, leakage sealing and other method was applied to effectively seal the gas emission channel and the monitoring and control method was applied to dynamically monitor and measure the site condition and to check the control effect.With a series of the al ternatives conducted, the harmful gas carbon monoxide volume fraction in the gateway driving was reduced from 120x10-6 to 10 x10-6, the gas volume fraction was re duced from 0.80% to 0.02% and the carbon dioxide volume fraction was reduced from 0.60% to 0.04%.The gas variations showed that the method could effectively cont rol the gas content over limit problem of the gateway driving along goaf and could ensure the safety and rapid driving of the driving working face.