The utility model relates to a sulfur hexafluoride retrieves to aerify and measures composite set. A sulfur hexafluoride retrieves to aerify and measures composite set, includes a SF6 switch combination coupling, SF6 switch combination coupling includes a body and connects the union nut in body one end, the other end of body is connected with a tee bend, the first port of three -way is connected with SF6 switch combination coupling's the other end, and three -way second port is connected with the second and connects, and three -way third port is connected with the crossover sub, the 2nd union nut's the other end is connected with the recovery gas tube through the ferrule, the crossover sub is connected with needle type valve, quick -operation joint and measuring catheter in order. This application the convenient staff's operation of sulfur hexafluoride retrieves to aerify and measures composite set's invention, has compensatied sulfur hexafluoride and has measured the defect that the attach fitting was not suitable for mutually, satisfied the existing high efficiency of nowadays working, relevantly connected general requirement.