The utility model provides an automatic sulfur hexafluoride gas device that mends of GIS, includes GIS equipment, gas sampling joint and valve, sulfur hexafluoride gas pressure sensor, sulfur hexafluoride gas pressure signal processor, industrial computer, the bottled make up gas of sulfur hexafluoride and adjustable tonifying qi valve. Through the utility model discloses gas pressure's situation of change can be observed very directly perceivedly to the device to the realization is reported to the police and is indicateed the function of tonifying qi, but adjusting valve receives tonifying qi order back, opens the valve immediately and carries out the tonifying qi to the GIS equipment that leaks gas, and till mending rated pressure, this has just reduced work load greatly, and can carry out the safe and reliable operation of uninterruptedly tonifying qi, assurance equipment in real time according to the air chamber pressure condition. The utility model is suitable for an it is gaseous as GIS electrical equipment insulating and arc -extinguishing medium to use sulfur hexafluoride.