Packaging box with high heat retaining property

The utility model discloses a packing box with high heat retaining property, which comprises a packing box and a cover plate positioned at the top of the packing box. According to the packaging box, the first inner container, the second inner container, the connecting mechanism and the auxiliary limiting mechanism are arranged, the first inner container and the second inner container play a role in heat preservation on the interior of the packaging box, the cover plate is connected with the packaging box through the connecting mechanism, and meanwhile the cover plate is convenient to open; the effect of improving the attaching effect between the cover plate and the packaging box is achieved through the auxiliary limiting mechanism, so that the effect of improving the heat preservation effect is achieved, the advantage of being good in heat preservation effect is achieved, and the problems that existing packaging boxes are various, and when objects are packaged, the packaging boxes only can achieve the protect