Air sampling absorption tube

The utility model relates to an air sampling absorption tube which comprises a sealing installation cylinder, the upper end of the sealing installation cylinder is fixedly connected with an absorption cylinder II communicated with the inside of the sealing installation cylinder, the upper end of the absorption cylinder II is provided with an absorption cylinder I which penetrates through the absorption cylinder II and is fixedly connected with a penetrating part, and the absorption cylinder I is communicated with the absorption cylinder II. A circular top plate is arranged in the first absorption barrel, mounting rods fixedly connected with the inner surface of the first absorption barrel are fixedly connected to the two sides of the circular top plate, and a backflow prevention mechanism is arranged at the lower end of the circular top plate. The air sampling absorption tube disclosed by the utility model can play a good anti-backflow function on a sampler, prevents gas collected in the sampler from flowing