The invention relates to a kneading
threshing device which comprises a bottom plate, a roller device, a feeding device, a
threshing structure and an air cylinder device, wherein the roller device comprises a first bracket, a first vertical rod, a roller, first bumps, a first slanting pole, a first transverse rod and a baffle plate, wherein the feeding device comprises a first supporting rod, a first feeding
pipe, a second feeding
pipe, a feeding hopper, a first fixed bracket, a first fixed block, a second transverse rod and a third slanting pole; the
threshing structure comprises a supporting block, a threshing plate, second bumps and first springs; the air cylinder device comprises an air cylinder, a pushing rod, a transverse plate, second vertical rods, second springs, first
cushion blocks, second
cushion blocks and third springs; a second groove is formed on the upper surface of the supporting block, the threshing plate is in a hemicyclic shape, each of the second bump is semispherical, each of the second bump is fixedly connected with the inner surface of the threshing plate, the two first springs are located on the left and right sides, respectively, and the first springs are inclined. The kneading threshing device provided by the invention can be used for effectively threshing seeds and is high in threshing efficiency.