Lightweight heat-storage and heat-preservation building block

The utility model discloses a lightweight heat-storage and heat-preservation building block. The lightweight heat-storage and heat-preservation building block comprises a foamed cement base layer. The technical key points adopted by the utility model are as follows: phase-change heat-storage and heat-preservation material layers are arranged on one side or two sides of the foamed cement base layer; and strength enhanced cement layers are also arranged at the edges of the foamed cement base layer and the phase-change heat-storage and heat-preservation material layer. The utility model aims at providing a heat-storage and heat-preservation building block; the phase-change heat-storage and heat-preservation material is arranged on the surface of the building block wall and can be doped in concrete and mortar; the heat is stored by virtue of solar energy; the heat preservation effect is achieved; the energy is saved by 45%; the cost is reduced; the construction efficiency is improved; and the material is saved.