Marking device for road and bridge construction and usage method thereof

The invention discloses a marking device for road and bridge construction. The device comprises a box body, a handrail is fixedly connected to one side of the box body, a hopper is fixedly embedded inthe upper side of the box body, two universal wheels are symmetrically arranged on the lower portion of the rear side of the box body, a containing groove is formed in the middle of the lower side ofthe box body, and roller cavities are formed in the positions, located in the box body, of the two sides of the containing groove. According to the marking device for road and bridge construction, aworker can directly push a handrail to automatically conduct brushing and marking, brushing marks can be made to be intermittent dotted lines in a cam pushing mode, the coating rollers are fixedly arranged on the outer sides of the middles of the rotating rods in a sleeving mode, and the outer sides of the two ends of each rotating rod are rotationally sleeved with guide rods. When the bristles are collected into the contai