Macromolecular PP material food packaging box with heat preservation function

The utility model relates to the technical field of food packaging, in particular to a polymer PP (polypropylene) material food packaging box with a heat preservation function, which comprises a food packaging box, a food packaging cover is rotatably connected to the rear side of the top of the food packaging box, and a sealing block is fixedly connected to the bottom of the food packaging cover. The top of an inner cavity of the food packaging box is fixedly connected with a sealing ring matched with the sealing block, and a cavity is formed in the food packaging box. In the actual using process, food is placed in the sealed food packaging box, air circulation is reduced, the heat preservation performance of the packaging box is improved, therefore, the taste of the food cannot be affected, the practicability of the food packaging box is improved, and the problems that an existing food packaging box does not have heat preservation performance, and if the food is directly located in circulating air, the food