Grain unloading structure of grain combines

The utility model discloses a grain unloading structure of grain combines. The grain unloading structure comprises a first auger conveyor, wherein the first auger conveyor is arranged at the bottom of a granary and is used for horizontally conveying grain, and a grain outlet of the first auger conveyor is provided with a second auger conveyor used for upward conveying grain; and a grain outlet of the second auger conveyor is provided with a section of elbow, the elbow is driven by a hydraulic cylinder to rotate around the axis of the second auger conveyor, and the other end of the elbow is provided with a third auger conveyor used for unloading grain. According to the grain unloading structure, the grain unloading position can be conveniently adjusted according to need, the trouble of operating a grain unloading tube manually is avoided, working capacity is effectively lightened, and the grain unloading efficiency is improved.