The invention discloses a wedge-shaped wall plate capable of saving energy, absorbing sound and damping. The wedge-shaped wall plate comprises a wall plate body, wherein a wedge-shaped splicing structure is arranged on the side surface of the wall plate body, a supporting damping structure is installed on the front side surface of the wall plate body in an embedded mode, and a sound absorbing structure is arranged in the supporting damping structure. The wedge-shaped splicing structure is composed of a wedge block and a wedge-shaped groove together. The wedge block is fixedly installed on theside surface of the wall plate, and the wedge-shaped groove is formed in the side surface of the wall plate. The invention relates to the technical field of wall plates, the wall plate has good damping effect and better sound absorbing effect, cannot be damaged caused by impact. The wall plate can be reused after disassembly, and are very energy-saving and environmentally friendly.