Plastic packaging type high-strength heat preservation open packaging box

A plastic package type high-strength heat preservation open packaging box comprises a polystyrene foam box and a plastic package outer sleeve arranged on the polystyrene foam box in a sleeving mode, and the plastic package outer sleeve is made of a heat shrinkage film. The polystyrene foam box comprises five polystyrene foam boards used for being spliced and matched with one another, and one polystyrene foam board is used as the box bottom of the polystyrene foam box. The rest four polystyrene foam plates are used for being matched with one another and vertically spliced on the polystyrene foam plate serving as the box bottom to form a box body of the polystyrene foam box; a groove I used for being spliced and matched with the polystyrene foam board serving as the polystyrene foam box body is formed in the polystyrene foam board serving as the box bottom of the polystyrene foam box. The foldable heat-preservation box is practical, convenient, heat-preservation, high in strength, foldable to transport and favo