Container for containing sheet

The invention relates to a container for containing a sheet, which mainly comprises a box body, a box door, a plurality of support columns and a latch device, wherein the box body is provided with an opening and an internal area, and at least one pair of movable buckling elements is pivoted near the opening; the box door is provided with an inner surface and used for sealing the opening of the box body; the support columns are configured on the inner surface of the box door and used for supporting the sheet; the latch device is configured in the box door; when the inner surface of the box door seals the opening of the box body, the latch device can move between a first position and a second position along a reciprocating direction; in the first position, the latch device is contained in the box door; in the second position, the latch device extends out of the box door and is in contact with the movable buckling elements of the box body, and the box door moves to a seal direction by the movable buckling elemen