Multifunctional metal roof and construction method thereof

The invention relates to the technical field of building engineering, in particular to a multifunctional metal roof and a construction method thereof. The multifunctional metal roof made by the construction method comprises a plurality of roof purlins mounted at the top of a building and pressed steel plates fixed to the top of the roof purlins and also comprises leveling steel plates, waterproof coils, a ventilation denoising wire mesh and a plurality of aluminum-magnesium-manganese alloy gussets, the leveling steel plates are fixed to the top of the pressed steel plates, and the waterproof coils are fixed to the top of the leveling steel plates; the aluminum-magnesium-manganese alloy gussets are fixed to the top of the waterproof coils, and the ventilation denoising wire mesh is spread between the waterproof coils and the aluminum-magnesium-manganese alloy gussets. The multifunctional metal roof is better than the traditional planting roofs, water storage roofs and elevated roofs, is lower in overall manufacturing cost and has functions such as waterproofing, denoising, thermal insulation, acoustic insulation and decorating.