Prefabricated composite board with industrial waste residue expanded material as core material and preparation method of prefabricated composite board

The invention discloses a prefabricated composite board with industrial waste residue expanded material as a core material and a preparation method of the prefabricated composite board. The preparation method comprises the following steps: cutting the industrial waste residue expanded material into a cuboid core material with corresponding size; manufacturing a steel wire mesh frame around the core material, and enabling the distance between each surface of the core material and the opposite net frame to be 1-1.5 cm; placing the core material with the steel wire mesh frame in a mold, and enabling the distance between each surface of the steel wire mesh frame and the inner wall of the mold to be 1-2 cm; and pouring mortar into the mold, and performing solidifying and forming to obtain the prefabricated composite board. According to the preparation method, industrial waste residues can be prepared into the prefabricated composite board, resource utilization of the industrial waste residues is achieved, the manu