Modified corn thresher

The utility model discloses a modified corn thresher, which comprises a frame, the top of frame is provided with threshing box, the threshing box below is provided with the negative pressure bellows, negative pressure bellows below is provided with the proportion platform, proportion platform below is provided with the malleation bellows, parallel arrangement has three filter vat in the threshing box, be provided with a threshing roller in every filter vat, threshing roller's one end is provided with the switch -plate, threshing roller's the other end is provided with the first muscle of threshing, the last interval of threshing roller is provided with a plurality of post and the second muscle of threshing of threshing, the post of threshing is connected through first bullet spring body with threshing roller, the second is threshed the muscle surface and has been cup jointed a plurality of fin, negative pressure bellows top is provided with feed inlet and first air outlet, and the feed inlet below is provided