The utility model relates to a gaseous quick -operation joint that detects of sulfur hexafluoride, it seals including ventilate head, internal thread propulsive element, outer screw thread pedestal, blow vent seat and base and covers, the first right -hand member of ventilating be provided with the propulsion post, internal thread propulsive element middle part is provided with internal thread hole A, a bottom in internal thread hole is provided with through -hole B, outer screw thread pedestal middle part is provided with through -hole C, blow vent seat left side middle part is provided with guide post and pneumatic valve, the sealed lid middle part of base is provided with internal thread hole C, internal thread propulsive element and outer screw thread pedestal are connected, outer screw thread pedestal right side and blow vent seat left side is connected, the right part of head and the left and right sides portion that the guide post is located through -hole C respectively ventilate, pneumatic valve and the contact of propulsion post, the head of ventilating passes through -hole B, the spacing ring is located inside the A of internal thread hole, the sealed lid of base is connected with outer screw thread pedestal through internal thread hole C, the utility model has the advantages of it is rational in infrastructure, easy operation, quick, the leakproofness is good, and the security is high.