Gas sampling pipe convenient to disassemble

The gas sampling tube comprises a sampling tube main body, one end of the sampling tube main body is fixedly connected with an external thread cylinder, one end of the external thread cylinder is provided with a dismounting cylinder, the inside of the dismounting cylinder is in threaded connection with the surface of the external thread cylinder, and one end of the dismounting cylinder is fixedly connected with a rubber sealing ring. Activated carbon filter cotton is arranged in the detachable cylinder, synthetic fiber filter cotton is arranged on one side of the activated carbon filter cotton, and an air suction pipe opening which penetrates through the detachable cylinder and is fixedly connected with the penetrating part is formed in the other end of the detachable cylinder. According to the gas sampling pipe convenient to disassemble, impurities in collected gas can be filtered, so that the impurities in the gas are prevented from influencing subsequent gas inspection, and the practicability is improved.