Fireproof structure for door and window opening of prefabricated sandwich outer wall system

The utility model belongs to the technical field of building fire prevention, and relates to a door and window opening fireproof structure of a prefabricated sandwich outer wall system. The structure comprises an inner blade, a heat preservation layer, an outer blade and heat preservation mortar strips. The inner leaf, the heat preservation layer and the outer leaf are sequentially and adjacently arranged, the outer leaf is provided with a flanging in the direction of the inner leaf along the periphery of the door and window opening, and the space formed by the inner leaf, the heat preservation layer and the outer leaf is filled with the heat preservation mortar strip. According to the structure, the problem of weak fireproof points of door and window openings of a prefabricated building prefabricated sandwich outer wall system is effectively solved, the fireproof performance of the door and window openings is improved, the door and window openings meet the fireproof standard requirement, and meanwhile, cold