Track spraying device for tunnel lining maintenance

The invention discloses a track spraying device for tunnel lining maintenance. The track spraying device for tunnel lining maintenance comprises tracks laid on the two sides of a tunnel wall, and a spraying trolley running along the tracks, wherein a track charging device is arranged at the start end of each track; the spraying trolley comprises a trolley body, an automatic charging system which is arranged at the head portion of the trolley body, and an automatic water supplementing system; the automatic charging system comprises charging terminals and a position sensor, the charging terminals are connected to the track charging devices, and the position sensor is used for sensing the track charging devices; and the automatic water supplementing system is arranged on the trolley body and comprises a water storage tank and a water supplementing sensor arranged on the inner wall of the water tank. The track spraying device for tunnel lining maintenance has a remarkable water spraying full-coverage effect durin