Telescopic sampling tube

The utility model discloses a telescopic sampling pipe, which belongs to the field of gas sampling equipment and comprises a gas distribution box, first gas pipes connected with gas collection equipment are inserted into the left end and the right end of the gas distribution box, and a plurality of uniformly distributed connecting pipelines are inserted into the front end of the gas distribution box. When sampling is carried out in an area where sampling personnel cannot reach conveniently, a worker can extend and limit a plurality of telescopic assemblies in a second air pipe to prevent the telescopic assemblies from retracting due to volatility in the sampling process, and under the action of the telescopic assemblies, the telescopic assemblies can be separated from the second air pipe, so that the sampling efficiency is improved. The length of the whole sampling pipe is greatly prolonged, sampling personnel can be far away from a gas source of poisonous and harmful gas when working, safety and reliability