Construction structure of concrete pouring surface layer of flat roof of building

The utility model discloses a construction structure of a concrete pouring surface layer of a flat roof of a building, and solves the problems that a dividing strip in a dividing joint is difficult totake out and the forming effect of the dividing joint is poor during the construction of the concrete surface layer of the flat roof of the existing building. The structure comprises a base layer (1)on the flat roof of the building, a separation seam forming square steel mold (2) is arranged on the base layer (1), lubricant layers (3) are arranged on the two side faces of the separation seam forming square steel mold (2), right-angle conical fixing mortar layers (4) are arranged on the outer sides of the lubricant layers (3), and concrete pouring surface layers (5) are arranged on the base layer (1) on the outer sides of the right-angle conical fixing mortar layers (4). The device is low in manufacturing cost and easy to operate, shrinkage cracks of concrete are reduced, and the qualityof a concrete surface layer