The invention relates to the technical field of municipal administration and discloses a road dotted line marking device capable of automatically cleaning a to-be-marked
road surface. A
carriage is included, and moving wheels and a spraying type mark
scriber are arranged at the bottom of the
carriage. A first motor and a cylinder body are arranged in the
carriage, an output end of the first motoris fixedly connected with a first gear, the upper end of the first gear is fixedly connected with a rotating rod, the end, away from the first gear, of the rotating rod is movably connected with a
piston rod, and the end, away from the rotating rod, of the
piston rod is hinged to a
piston. According to the road dotted line marking device capable of automatically cleaning the to-be-marked
road surface, a sweeper is driven by a
rocker arm and a second motor to swing back and forth on the
road surface while rotating; and the piston is matched to reciprocate left and right in the cylinder body sothat a
coating is repeatedly sucked into or output from the cylinder body, the spraying type mark
scriber intermittently sprays the
coating by controlling the amount of the
coating, namely intermittent drawing and scribing are achieved, and therefore the effects of automatically sweeping a to-be-marked road surface and automatically drawing dotted lines are achieved.