Anti-blocking threshing system with drum and concave sieve plate

The invention relates to the field of agricultural machine devices, in particular to an anti-blocking threshing system with a drum and a concave sieve plate. The anti-blocking threshing system comprises a machine housing, the threshing drum and the concave sieve plate, wherein sliding rails are arranged in the machine housing, the two ends of the concave sieve plate are arranged in the sliding rails on the corresponding sides through sliding fit, and an anti-blocking mechanism is arranged in the portion, on one side of the concave sieve plate, of the machine housing. The anti-blocking mechanism comprises a supporting plate fixed into the machine housing, a belt wheel, a rotary shaft and an adjusting rod, wherein the belt wheel, the rotary shaft and the adjusting rod are arranged on the supporting plate; the supporting plate is provided with a driving device used for driving the rotary shaft to rotate, a belt is cooperatively installed on the belt wheel, one end of the belt is eccentrically connected to a rota