Heat preservation express box

The utility model relates to a heat preservation express box used for transporting articles, in particular to a heat preservation express box used for transporting low-temperature or ultralow-temperature articles such as food and medicine, and belongs to the technical field of cold chain heat preservation. Comprising four side panels, an upper panel, a lower panel and a plurality of bridles, the four side panels are mutually assembled into a whole to form a box body, the upper panel and the lower panel are respectively inserted into the top and the bottom of the box body to form a box body, and the box body is fastened through the bridles. Wherein the side panels, the upper panel and the lower panel are all of hollow structures and are filled with polyurethane foam, and the side panels, the upper panel and the lower panel are all provided with feed ports and vent holes. The heat preservation box has the advantages of being convenient to use, good in heat preservation effect, capable of tracking the temperatur