The utility model discloses an anchoring and supporting device for an exterior wall decoration integrated plate. The firmness, durability and shock resistance of the exterior wall decoration integrated plate can be improved. The integrated plate anchoring and supporting device comprises a hanging plate, the hanging plate is an L-shaped plate and is provided with a vertical plate and a horizontal plate; a bolt fixing groove is formed in the vertical plate, a short expansion bolt is installed in the bolt fixing groove, a bearing fixing bolt hole is further formed in the vertical plate of the hanging plate, a butterfly clamping piece bolt fixing hole is formed in the middle of a plate body of the butterfly clamping piece, and a bearing fixing bolt penetrates into the outer wall from the butterfly clamping piece bolt fixing hole and the bearing fixing bolt hole. According to the utility model, a guarantee is provided for preventing delaminating and cracking of the exterior wall decorationintegrated plate; the firmness, durability and shock resistance of the exterior wall decoration integrated plate are greatly improved, the service life of the exterior wall decoration integrated plateis effectively prolonged, the exterior wall decoration effect of a building for installation and use is improved, the maintenance cost of the building is greatly reduced, and the exterior wall decoration integrated plate has a remarkable use effect and application value.