The invention provides a cleaning device. The cleaning device comprises a rack (10), a plurality of supporting wheel sets (20), a first driver (22) and cleaning mechanisms (30), wherein the multiple supporting wheel sets (20) are arranged in the first horizontal direction at intervals, each supporting wheel set (20) comprises a supporting wheel (21), all the supporting wheels (21) are arranged on the rack (10) in a pivoted mode, and the rotating axis of all the supporting wheels (21) extends in the second horizontal direction perpendicular to the first horizontal direction; the first driver (22) drives at least one supporting wheel (21) of the supporting wheel sets (20) to rotate; the cleaning mechanisms (30) are arranged on the rack (10), each cleaning mechanism (30) is provided with a cleaning piece (31), and the cleaning pieces (31) have a cleaning state in which the cleaning pieces (31) are not lower than all the supporting wheel sets (20) on the horizontal plane. According to the cleaning device, the labor intensity of workers is relieved.