The archive box is not only the installation of the archive files, but also the carrier of the sequence of the archive files in the solidification box. The well-made file boxes with cover and ridge items can not only protect the files in the boxes well, but also provide a guarantee for the smooth retrieval and utilization. The external size of the file box is a cuboid 310mm long and 220mm wide. The thickness is generally 20mm, 30mm, 40mm and 50mm. Other sizes and thicknesses can also be set according to needs. This specification is designed according to the paper size of international general A4 (297mm×210mm) documents, and can be more convenient to access the documents in the box. Thickness allows for different sizes to facilitate the placement of files of different thickness. According to the different ways of placing, the file boxes can be divided into two types: vertical and horizontal. The horizontal file box is designed to increase the contact surface between the file and the file box, so as to avoid bending and breaking when the file is placed vertically "top-heavy". In the long run, the file box is more conducive to the protection of files. However, most of the existing file cabinets (racks) do not leave enough space for this way of placing, so the selection of horizontal file boxes should be considered at the same time the status of the file cabinets (racks). The organs and units in the selection of file boxes, the two formats of the file box can only choose one, in order to facilitate management, to ensure that the file box on the shelf neat, beautiful.