The invention discloses a building outer wall structure with double shaping
phase change material
layers. The building outer wall structure sequentially comprises the outer shaping
phase change wall board layer, a first
thermal insulation layer, a wall body layer, a second
thermal insulation layer, the inner shaping
phase change wall board layer from outside to inside, wherein the outer shaping phase change wall board layer and the inner shaping phase change wall board layer are respectively made of phase change materials of phase change temperatures of Tm1 and Tm2, the
phase change temperature Tm1 is set to be minimum in cold load all year round in the expositing environment of the
phase change temperature Tm1, and the
solid phase change materials melt into
liquid phase change materials when the wall board layer temperature is equal to or higher than Tm1; the
phase change temperature Tm2 is set to be minimum in
heat load all year round in the exposing environment of the phase
change temperature Tm2, and the
solid phase change materials melt into
liquid phase change materials when the wall board layer temperature is equal to or higher than Tm2. The invention further designs the components and proportion of the phase change materials of the two shaping phase change wall board
layers. By the building outer wall structure which is compact, high in adaptability, convenient to manufacture and maintain later, and the like, outer wall cold load and
heat load can be lowered effectively, and overall
energy consumption is lowered evidently.