Plough leg grass winding prevention device of rotary tillage combined seed and fertilizer drill

The utility model discloses a grass winding prevention device for a plough leg of a rotary tillage combined seed and fertilizer drill. The grass winding prevention device comprises a drill base frame(1), the plough leg (2), a grass scratching cutter shaft (7), a side edge connecting chain (4), a side edge shaft chain wheel (6), a side edge shaft (5), a side edge connecting transmission shaft (9)and a second gearbox shaft (10). During use, the gearbox is started, and the second gearbox shaft (10) rotates and drives the side edge connecting transmission shaft (9) to rotate; the side edge connecting transmission shaft (9) drives the side edge shaft (5) and the side edge shaft chain wheel (6) to rotate so as to drive the side edge connecting chain (4); the side edge connecting chain (4) is used for driving the grass scratching cutter shaft (7) to rotate, so as to drive the grass scratching cutter shaft (7) and the grass scratching cutter (3) to rotate; when the grass scratching knife (3)rotates, straw wound betwe