The invention relates to the technical field of building outer wall external
thermal insulation, and discloses a convex window-wall integrated board construction method which comprises the steps that according to the size of an outer wall and building requirements, the appearance and size of a
steel frame and a convex frame are determined, an upper adjusting mechanism and a lower adjusting mechanism are designed, and a
magnesium-based material is detected; materials enter a field, the
steel frame is spliced and formed through combination of H-shaped steel, convex grooves and concave grooves, the outer convex frame is spliced and formed through combination of the H-shaped steel and square pipes, and steel plate compounding is conducted on one side face of the
steel frame; the steel frame is reversed, and the
magnesium-based material is reversely arranged on the other side of the steel frame; drawing and reversing, and mounting the convex frame at the opening of the steel frame; the window-wall integrated plate is packaged, transported and installed on site, the reverse beating technology is adopted, after the whole unit module structure is assembled, overall reversing is conducted in a factory,
magnesium-based heat preservation materials are integrally cast into a structural frame, and the window-wall integrated plate is high in strength, light in weight, good in heat preservation performance and convenient and fast to install.