The utility model relates to a novel flue gas sampling device, including sampling branch pipe phi D1, the female pipe phi D2 of sampling, sampling branch pipe phi D1 is for linking two of and locate in the flue inner wall from the female pipe phi D2 of sampling, be equipped with the sampling aspirating hole of one row of equidistance trompil on the sampling branch pipe phi D1. The beneficial effects of the utility model are that: multi point sampled improves flue gas analysis's representativeness. The device is simple, and the sampling device reliability is high. The sample mode is reasonable, avoids the stifled ash of analytical equipment. The investment cost is few, does not have adverse effect to deNOx?systems.