Multifunctional wallboard made of composite building energy-saving material

The composite building energy-saving material multifunctional wallboard comprises a frame, a clamping piece, a positioning block and a reinforcing plate, the frame is arranged to be of a rectangular plate-shaped hollow structure, and a fireproof layer, a heat preservation layer, a sound absorption layer, the reinforcing plate and an anti-corrosion layer are sequentially bonded to the interior of the frame from top to bottom through reinforcing glue. A clamping piece is embedded in the right side wall of the frame, a clamping groove is formed in the end, away from the frame, of the clamping piece, a positioning block connected with the clamping groove in a clamped mode is embedded in the left side wall of the frame, and the positioning block is of a T-shaped structure. The fireproof layer is tightly attached to the upper surface of the heat preservation layer, the heat preservation layer is tightly attached to the upper surface of the sound absorption layer, the sound absorption layer is bonded to the upper su