The utility model discloses a novel multi -functional heated board of outer wall divide into five layers from inside to outside, and the intermediate level is the heat preservation, and heat preservation both sides face sets up the waterproof layer respectively, and the lateral surface of two waterproof layers sets up the flame retardant coating respectively. Heat preservation, thermal -insulated, waterproof, the noise proof function of fire prevention have been synthesized to this heated board, can satisfy the demand of people in to modern building.