Outer wall surface reconstruction structure of old building

The utility model relates to the field of building reconstruction, and discloses an old building outer wall surface reconstruction structure which comprises an original old wall body, an original old wall surface, an EPS decoration line foot, a bolt and real stone paint. The EPS decorative arris is made of a polystyrene foam material, is anchored on an original old wall body through a bolt, is adjacent to the arris of the window edge and is positioned on the outer side of the arris; and the real stone paint is externally coated on the outer surface of the original old wall surface and the outer surface of the EPS decorative line leg. According to the utility model, the EPS decorative line foot and the real stone paint are adopted to reform the external facade of the old building, the original old wall body structure does not need to be reinforced or dismantled, the construction can be directly carried out on the original old wall surface, and the structure is suitable for the wall body reformation of various