The invention relates to a reverse nailed aluminum alloy wood-imitating cornice for ancient architecture. The reverse nailed aluminum alloy wood-imitating cornice for the ancient architecture is characterized in that the upper part of a concrete wallboard extends outwards and downwards in an inclined manner to form a cornice plate, an aluminum stopping eave is arranged at the end part of the outerside of the cornice plate, the outer side of the aluminum stopping eave is connected with an aluminum eave plate and an aluminum tile edging plate, the aluminum tile edging plate is positioned on thealuminum eave plate, a full-length steel square tube keel is installed at the bottom of the cornice plate, an imitation shedthins tile cement pressure plate is arranged on the steel square tube keel,an aluminum eave rafter and an aluminum fly rafter are arranged on the imitation shedthins tile cement pressure plate, aluminum rafter-gap filling wood is arranged between the aluminum eave rafter and the aluminum fly rafter, the lower end part of the aluminum eave rafter is fixed to the aluminum rafter-gap filling wood through screws, the lower end part of the aluminum fly rafter is fixed on thealuminum stopping eave through screws, and an aluminum gate rafter plate, an aluminum stringer, an aluminum connecting wood plate, an aluminum wood and an aluminum wood brace are sequentially arranged on the outer side, cling to the lower part of the aluminum eave rafter, of the concrete wallboard connected with the cornice plate, and are tightly buckled on the internal steel square tube keel. The appearance integrity and the assembling strength are improved, and the corrosion resistance, the fire resistance and the durability are improved.