Seed buoyancy sorting box

The utility model relates to the field of seed processing, in particular to a buoyancy separation box for seeds, which comprises a separation box, a partition plate I and a partition plate II are sequentially and obliquely arranged in the separation box from top to bottom, the partition plate I comprises a plurality of groups of movable plates which are arranged at equal intervals, and rotating shafts of the movable plates are arranged on the same oblique straight line. The adjacent movable plates rotate to enable the close sides to abut against each other in a sealed mode, discharging openings are formed in the positions, on the low-position sides of the partition plate I and the partition plate II, of the sorting box respectively, collecting boxes are correspondingly installed at the two sets of discharging openings, and filtering pieces used for filtering sorting liquid are arranged in the collecting boxes. And impurities on the upper layer and seeds on the lower layer in the sorting solution are separated