Automatic atmosphere sampling instrument with good sealing performance

The utility model relates to the technical field of sampling instruments. The utility model discloses an automatic atmosphere sampling instrument with good sealing performance. The sampling instrumentcomprises a sampling instrument body, tray racks are fixedly mounted on the left side and the right side of the sampling instrument body; fixed rods which are distributed in a bilateral symmetry manner are fixedly mounted at the top of the sampling instrument body; the tops of the two fixing rods are fixedly connected with a fixing ring; a butt joint ring is fixedly mounted at the top of the sampling instrument body; a connecting pipe is in threaded connection with the interior of the fixing ring, a fixing pipe is fixedly mounted at the top of the connecting pipe, a bearing is fixedly mountedon the outer side of the fixing pipe, a rotating ring is fixedly mounted on the outer side of the bearing, a lower ring is fixedly mounted on the outer side of the fixing pipe, and a mounting shell is in threaded connection w