Green energy-saving fabricated building and construction method thereof

The invention discloses a green energy-saving fabricated building and a construction method thereof.The green energy-saving fabricated building comprises a building floor, reinforcing rods, prefabricated wallboards, heat preservation cavities and a prefabricated roof, the reinforcing rods are fixed to the upper side of the building floor, a transverse framework is welded between every two adjacent reinforcing rods, the prefabricated wallboards are arranged on the outer sides of the reinforcing rods, and the heat preservation cavities are formed in the prefabricated wallboards; and a prefabricated roof is mounted at the tops of the prefabricated wallboards. According to the green and energy-saving fabricated building and the construction method thereof, the fabricated building replaces building materials to be piled and formed, the green and energy-saving effect can be achieved during construction, threaded transmission is carried out by screwing a threaded section and a threaded sleeve of a locking pin, and w