The invention discloses a novel efficient and energy-saving building wall convenient to clean. A deadening felt is arranged inside a wall body, a colorful elastic polyurethane waterproof coating layer is arranged on the right side of the deadening felt, the left side of the colorful elastic polyurethane waterproof coating layer is sprayed on the right side of the deadening felt, a thermosetting resin impregnated paper high-pressure laminated plate is arranged on the left side of the deadening felt, the right side of the thermosetting resin impregnated paper high-pressure laminated plate is fixedly connected to the left side of the deadening felt, polyurethane foam plastic is arranged on the left side of the thermosetting resin impregnated paper high-pressure laminated plate, and the right side of the polyurethane foam plastic is fixedly connected to the left side of the thermosetting resin impregnated paper high-pressure laminated plate. According to the novel efficient and energy-saving building wall, through cooperation of around rod, a transverse rod and a sliding block, the wall body is protected through the baffle, meanwhile, the baffle is detachable, dust is prevented from being attached to the wall body and being difficult to clean, and the problems that when an existing device works, the dust is generated on the surface of the wall body, cleaning is inconvenient are solved, and limitation does not exist.