File storage box

The utility model relates to the field of storage boxes, and discloses a file storage box which comprises a box body, a box cover is mounted at an opening in the top end of the box body, a plurality of partition plates are movably mounted in the box body, a sliding groove is formed in the middle of one side of each partition plate, a movable block is movably mounted in each sliding groove, and fixing frames are welded to the two sides of each movable block. Grooves are formed in the middles of the upper end and the lower end of the inner wall of the fixing frame, movable parts are movably installed in the grooves, connecting baffles are welded to the middles of one sides of the movable parts, and limiting mechanisms are further arranged in the box body and used for fixing the partition plates to different positions in the box body; the internal space of the box body is partitioned by matching the partition plates with the connecting baffles, so that the effect of conveniently adjusting the size of the partiti