Novel anti-sprinkling safe seed extraction case body of baby combine harvester

The utility model discloses a novel throwing-preventing safety threshing box for a small-sized combined harvesting machine and solves the problems of the existing 4L-80-type small-sized rice and wheat combined harvesting machine, including waste caused by throwing rice and wheat at straw discharge port and human hurt due to throwing fallen hard foreign matters or metal pieces. The threshing box has the advantages of simple structure convenient use, and capability of effectively prevent rice/wheat or hard matter being thrown out. The threshing box comprises a threshing box body with a box cover, a threshing cylinder is provided inside the threshing box body, a screen mesh is arranged below the threshing cylinder, a box body straw discharge port and a box cover straw discharge port are respectively arranged at the same side of the threshing box body and box cover, and the threshing box body is heightened in longitudinal direction; and a throwing-preventing safety device verging towards front upward are respecti