The invention discloses an automatic cleaning device for a wheat harvester air bellow cover, and relates to the field of agricultural machinery. The device mainly comprises a U-shaped hairbrush plate,a sliding guide rail, a gear motor, a bearing support, a belt, belt pulleys and a base, the gear motor is connected with a universal joint to drive the small belt pulley to rotate, the small belt pulley drives the large belt pulley to rotate through the belt to drive a first connecting rod to rotate, the first connecting rod is connected with a second connecting rod, the second connecting rod ishinged to a third connecting rod, and the third connecting rod is hinged to a traction frame, so that the U-shaped hairbrush plate is driven to reciprocate on the sliding guide rail. A soft hairbrushis mounted on the inner side of the U-shaped hairbrush plate, and the U-shaped hairbrush plate reciprocates to clean the air bellow cover. The automatic cleaning device for the wheat harvester air bellow cover is used for automatically cleaning the agricultural wheat harvester air bellow cover and overcomes the shortcoming that the air bellow cover needs to be irregularly and manually cleaned in the harvesting process, and working efficiency is greatly improved.