The invention discloses a novel phase-change heat insulation and
moisture absorption building external envelope structure. The novel phase-change heat insulation and
moisture absorption building external envelope structure comprises an outer wall, a roof and a bottom, wherein the outer wall is provided with an interface decoration layer, a wall phase-change material layer I, a wall basic layer, a wall phase-change material layer II, a wall
airflow channel, a glass internal
curtain wall and a turnover
curtain wall which are sequentially arranged from the inside out; an air distribution
pipe is arranged in the wall
airflow channel on one side; a roof phase-change material layer, a waterproof layer, a
cement layer, an inclined top surface and a ceiling are sequentially arranged above the
airflow channel; a throttling and cooling device is arranged between the ceiling and the inclined top surface; a supporting and isolating mechanism is arranged under the bottom; and a
moisture absorption phase-change material layer, a base layer, a heat insulation phase-change material layer and a baseplate are arranged above the supporting and isolating mechanism. The novel phase-change heat insulation and
moisture absorption building external envelope structure has favorable heat insulation and
moisture absorption effects, the bottom and the ground are isolated by a certain space area through the supporting and isolating mechanism, and together with the
moisture absorption phase-change material layer, a favorable damp-proof role can be played, so that natural resources are reasonably utilized, and
environmental protection and energy saving are achieved.