This utility model relates to a turnover box, and more particularly to a turnover box specifically for re-dried tobacco flakes. It includes a bottom cover and a top cover, with the top cover fitted over the upper outer part of the bottom cover. It also includes a blocking plate, a magnetic block, and a large iron plate. Movable grooves are provided on both sides of the lower part of the top cover, with movable blocking plates installed within these grooves. Magnetic blocks are embedded in the inner side of the blocking plates. Grooves corresponding to the positions of the movable grooves are provided on both sides of the outer side of the bottom cover, with large iron plates fixed within these grooves. When the top cover is closed onto the bottom cover, the large iron plate and the magnetic block within the blocking plate attract each other, achieving a locking and fixation. This utility model, by setting a blocking plate with a magnetic block in the movable groove of the top cover and placing a large iron plate at a corresponding position on the bottom cover, allows for quick locking when the top cover is closed onto the bottom cover, eliminating the need for additional operation, significantly improving closing efficiency, and ensuring sealing and safety during transportation and stacking.