The utility model discloses a heat-accumulation phase-change passive solar heat collection heat preservation window which comprises a plurality of movable phase-change heat-accumulation heat preservation shutters, a fixed frame and a piece of hollow glass. The fixed frame is connected with a fundamental component through an upper window frame beam and a lower window frame beam. The movable phase-change heat-accumulation heat preservation shutters are connected into the fixed frame in a rotatable mode. The piece of hollow glass is arranged on one side close to the outdoor portion. When the movable phase-change heat-accumulation heat-preservation shutters are in the closed state, an air layer is formed between the movable phase-change heat-accumulation heat preservation shutters and the piece of hollow glass. According to the heat-accumulation phase-change passive solar heat collection heat preservation window, outdoor sunlight directly irradiates a phase-change heat-accumulation composite inner decorative plate in the day, phase-change heat-accumulation materials change from the solid state to the liquid state, and heat is stored in the phase-change heat-accumulation materials; at night, the phase-change heat-accumulation composite inner decorative plate is arranged on the indoor side, and the phase-change heat-accumulation materials change from the liquid state to the solid state and begin to release heat to supply heat indoors; meanwhile, a heat reflection veneer heat preservation plate and the air layer keep the window warm, and the thermal performance of the window is greatly improved.