Phase-change heat-accumulation seepage-prevention hollow plastic plate and construction method thereof

The invention discloses a phase-change heat-accumulation seepage-prevention hollow plastic plate. The phase-change heat-accumulation seepage-prevention hollow plastic plate is composed of a plurality of cuboid-shaped unit lattices, wherein a water inlet and a water outlet are formed in the side wall of each unit lattice; the adjacent unit lattices are communicated with each other via the water inlets and the water outlets of the unit lattices; water is used as a mobile phase change material in the phase-change heat-accumulation seepage-prevention hollow plastic plate composed of the unit lattices. The phase-change heat-accumulation seepage-prevention hollow plastic plate is convenient to transport, assemble and construct; the water is used as the phase change material, so that the plastic plate has excellent heat accumulation and preservation effects.