Tunnel mileage paint spraying marking device

The utility model provides a tunnel mileage paint spraying marking device, which belongs to the technical field of tunnel operation and comprises a paint spraying tank, a paint spraying pipe, a spray gun, a fixed shaft sleeve, a rotating ring, a motor and a gear. The rotating ring comprises an outer ring sleeve, an inner gear ring, an inner ring sleeve and a supporting rod; the inner gear ring and the inner ring sleeve are located on the circular end faces of the two sides of the outer ring sleeve correspondingly and connected through a plurality of supporting rods arranged in the circumferential direction. The multiple rotating rings are sequentially arranged on the fixed shaft sleeve in a sleeving mode, and the inner ring sleeve is rotationally connected with the fixed shaft sleeve through a bearing; a plurality of gear through holes and a plurality of spray gun through holes are formed in the circumferential side wall of the fixed shaft sleeve; a plurality of motors are fixed on the inner wall of the fixed