Threshing cleaning device for harvester

A threshing screening device of agricultural cropper used for the threshing of crops is provided; the purpose is to provide a threshing screening device of cropper with concise structure, small cubage and low cost. The utility model comprises a shell and a screening net. The threshing device of the transmission mechanism is provided with a threshing screening cylinder, whose front part has threshing teeth, and rear part has spiral blades and spike teeth. Among spiral blades are horizontal separation plates. Threshing teeth are threshing tooth structure of ordinary cropper, and spiral blades are spiral blade structure of re-threshing device of ordinary cropper. The width of spiral blades on the threshing screening cylinder can be one fifth to one second of the length of the cylinder; the height of spike teeth is bigger than that of spiral blades, and its density is equivalent to that of threshing teeth. And separation plates are as high as spiral blades.