Flue gas sampling device

The utility model discloses a flue gas sampling device and relates to the technical field of flue gas sampling. The device comprises a sampling pipe and a return pipe which are communicated and arranged on one side of a flue, wherein an air pump for driving gas in the flue to enter from the sampling pipe and return to the flue through the return pipe is arranged between the sampling pipe and the return pipe; a first pipeline is communicated between the sampling pipe and the air pump; a second pipeline is communicated between the air pump and the return pipe; the first pipeline is communicated with a sampler through a branch pipe, and the sampler is further communicated with an exhaust pipe; during sampling, flue gas in the sampler is exhausted through the exhaust pipe and is fed into the storage for storage. The flue gas sampling system comprises a sampling pipe, a return pipe, a first pipeline, a second pipeline, a gas pump and a sampler; during sampling, a pipeline system composed of the first pipeline and