Motor vehicle tail gas detection connecting structure

The utility model relates to the technical field of detection connecting structures, and discloses a motor vehicle tail gas detection connecting structure which comprises a detector, a connecting pipe and a connector, the connecting pipe is located on the right side of the detector, a connecting groove is formed in the right side of the connector, and the detection end of the detector and the connecting pipe are connected together in a sealed mode. A connecting cylinder is fixedly installed on the right side wall face of the connecting pipe, a connector is arranged on the right side wall face of the connecting cylinder, and two sets of positioning plates move in the connecting pipe. In the using process, the connecting groove of the connector is arranged on the outer wall of the automobile exhaust pipe in a sleeving mode, a bronze drum auxiliary mechanism is connected, the two-way threaded rod starts to rotate, the two sets of guide blocks move away from each other in the guide groove, the two sets of positio