Manually assembled and disassembled closed floor support plate

The utility model relates to the technical field of building boards, in particular to a manually assembled and disassembled closed floor support plate which comprises a main plate body. The closed floor support plate capable of being manually assembled and disassembled is composed of the first main plate body, the second main plate body and the third main plate body, the left side assembly plate is fixedly connected with the right side assembly plate through the top installation mechanism, and the left side fixing plate is fixedly connected with the right side fixing plate through the bottom installation mechanism. The floor support plate can be disassembled and assembled according to requirements, the disassembled floor support plate can be conveniently transported, and meanwhile later maintenance is also facilitated; the reinforcing frame is inserted between the left assembling plate and the right assembling plate, and limiting plates fixed to the middles of the two sides of the reinforcing frame are clampe