Composite fireproof board and method of processing and preparing the same

A composite fireproof board comprising a structure, the structure comprising, from bottom to top, a bottom layer, a lower reinforcement mesh layer, a middle layer, an upper reinforcement mesh layer, and a surface layer,

• wherein the middle layer comprises a one-piece integral frame, and an inorganic fireproof material filled within the frame,
• wherein the frame is made of an organic material, the frame comprises (i) a plurality of first spaced apart edges and a plurality of second spaced apart edges, the second spaced apart edges extend between the first spaced apart edges to define the frame, and (ii) fixed grooves on inner edges of each of the plurality of first edges adjacent to the inorganic fireproof material and at least one through hole, and the fixed grooves are spaced apart from connections of the first and second edges,
• wherein the fixed grooves extend to surfaces of the middle layer that are in physical contact with the lower reinforcement mesh layer and the upper reinforcement mesh layer, respectively,
• wherein each of the fixed grooves comprise:
• a first portion connecting an inner edge of one of the plurality of first edges, and a second portion arranged in a perpendicular manner relative to the first portion and spaced apart from the inner edge of the one of the plurality of first edges, and
• wherein the inorganic fireproof material is filled within the fixed grooves and the at least one through hole.