Marking device for highway marking

The utility model belongs to the technical field of expressway marking, and particularly relates to a marking device for expressway marking, which is characterized in that a thread mounting cap is screwed in a thread groove of a storage barrel, so that the thread mounting cap is tightly attached to a sealing gasket of the storage barrel, the sealing effect is achieved, and the glossiness of internal spray paint is ensured. When a worker pushes the trolley body, the cleaning part firstly cleans the front end of a road surface; in the process, a driving motor on a fixed seat is started, the driving motor drives a cleaning roller to rotate, a brush part of the cleaning roller sweeps out dust, cleaning of the ground is completed in one step, and follow-up paint spraying is facilitated; in order to adjust the marking width, an electric telescopic rod at the bottom of the trolley can be started, the output end of the electric telescopic rod pushes a push rod and drives a supporting frame and a folding pipe to move