Concrete spraying maintenance system with mold based on tunnel secondary lining trolley

The invention belongs to the field of tunnel lining maintenance, and provides a tunnel secondary lining trolley-based concrete spraying maintenance system with a mold, which comprises a spraying device body, the spraying device body comprises a loop track and a loop traction trolley, the loop track is mounted above an upper longitudinal beam of a secondary lining trolley, the loop traction trolley is buckled above the loop track, and the loop track is mounted above the upper longitudinal beam of the secondary lining trolley. The spraying device body further comprises an axis track in the length direction of the tunnel, the axis track is placed on an upper panel of the secondary lining trolley, a plurality of spraying holes are formed in the top of the axis track in the length direction, and the bottom of the axis track is connected with the top of the loop traction trolley through a gear assembly. And the axis track is in sliding connection with the upper panel of the secondary lining trolley under the action