Purification ventilation pipe for purification room

The utility model discloses a purification ventilation pipe for a purification room, and relates to the technical field of purification ventilation pipes. In order to solve the problems that a filter screen in a ventilation pipeline is blocked when impurities are filtered out, and normal ventilation of the pipeline is affected, the purification ventilation pipe comprises a ventilation pipeline, two limiting blocks are fixedly connected to the interior of the ventilation pipeline, and the filter screen is fixedly connected between the limiting blocks and the ventilation pipeline; the inner wall of the ventilation pipeline is rotationally connected with a rotating connecting shaft, the rotating connecting shaft is located between the two limiting blocks, the outer wall of the periphery of the rotating connecting shaft is fixedly connected with rotating fan blades which are evenly distributed, and the rotating fan blades are provided with telescopic sweeping mechanisms. According to the design, pushing force cau