Mechanized plastering and finishing device for high-speed rail box girder top plate

The utility model belongs to the field of prefabrication of high-speed rail box girders, and particularly relates to a mechanical plastering and finishing device for a high-speed rail box girder top plate. Comprising a truss structure, two walking units, two scraper blade units and two roller units, and the two walking units are oppositely arranged and fixed to the two ends of the truss structure; the electric rollers of the two roller units are pulled open in the length direction of the truss structure, and the two electric rollers are overlapped front and back at the connecting position. The scrapers of the two scraper units are unfolded in the length direction of the truss structure, the adjacent sides of the two scrapers are beveled at a certain beveling angle, the two beveled planes are parallel after beveling, a certain gap is reserved between the two beveled planes, and the width of the gap is smaller than the product of the length of the working face on the cross section of each scraper and the sine v