The invention provides a tunnel cleaning machine which comprises a frame, a cleaning mechanism, a recovery device and a moving device. The cleaning mechanism comprises a cleaning device, an air compression mechanism and a liquid carbon dioxide storage tank, and the cleaning device is connected with the recovery device, the air compression mechanism and the liquid carbon dioxide storage tank separately. According to the invention, a nozzle moves longitudinally, transversely and swings left and right, so that the all-around cleaning of a tunnel is realized, the cleaning speed is high, the cleaning degree is high and the work efficiency is high. By adjusting the height of a first wheel, the first wheel of the cleaning machine is arranged on the road surface, a second wheel is arranged on theroad shoulder, so that the road occupation is reduced, the risks of traffic accidents are reduced, the dirt after tunnel cleaning and the carbon dioxide formed by the gasification of dry ice are recovered instantly according to the negative pressure principle, and the secondary operation is reduced, so that the work cost is reduced. Moreover, the tunnel cleaning and the absorption and recovery ofsubstances are performed simultaneously, so that the work efficiency is high, and the work cost is reduced.