Abstract: In order to effectively prevent the explosion flame propagate to import direction in gas drainage pipelines and ensure drainage pumping station equipment safety of ground and underground, the fire resistance and explosion venting devices are installed at the different locations in gas drainage pipelines. When the explosion flame arrives, explosive energy is relieved through vent piece, and flame is blocked by water. Fire barrier with water sealing and explosion venting device is designed with seal self-control function. Performance of the device is analyzed by computational fluid dynamics software, and results show that the venting mechanism is efficient, and the device is reliable.