GRAIN COMBINE HARVESTER

Some embodiments of the present invention provide a grain combine harvester. The grain combine harvester includes: a body, a pair of axial-flow drums, an engine, and a transfer case, where the pair of axial-flow drums are mounted on the body, the pair of axial-flow drums are arranged adjacent to each other in parallel, the engine and the transfer case are both mounted on the body, the engine is connected to the transfer case, and the pair of axial-flow drums are both connected to the transfer case. An integrated transmission case and a built-in wet clutch structure are used for drum transmission, and a traditional belt clutch structure is eliminated, so as to simplify transmission and improve reliability of the entire harvester.