Alfalfa seed threshing device and method

The invention relates to the field of seed threshing, in particular to an alfalfa seed threshing device and method. The technical problems that an existing alfalfa seed threshing device is insufficient in threshing and low in threshing efficiency are solved. The invention discloses an alfalfa seed threshing device and method. The device comprises a bottom frame and the like. The top of the bottom frame is connected with a barrel, the top of the barrel is provided with a feeding port, the lower portion of the bottom frame is connected with a first screen frame and a second screen frame in a sliding mode, the first screen frame is connected with the second screen frame, meshes of the first screen frame are larger than those of the second screen frame, a driving mechanism is arranged on the bottom frame, and a threshing mechanism is arranged on the driving mechanism. Wherein two of the six-edge bent frames rotate while moving towards the direction close to each other, and the rotation directions of the two six-e