Heat preservation box

The utility model relates to the technical field of heat preservation, and discloses a heat preservation box, and a heat preservation plate for manufacturing the heat preservation box comprises a foamed polypropylene protective layer and a vacuum heat insulation plate attached to the foamed polypropylene protective layer. The heat preservation plate is formed by compounding the foamed polypropylene and the vacuum heat insulation plate; the expanded polypropylene (EPP) is a novel environment-friendly thermal insulation material which can be completely recycled; the insulation board is good in insulation performance, long in service life, high in mechanical strength, easy to machine and form, small in density, low in cost and free of release of toxic and harmful substances. Therefore, compared with the prior art, the composite heat insulation board has the advantages of heat insulation performance, safety, usability, environmental friendliness, cost and the like, and after the foamed polypropylene is compounded