Area grain combine harvester

The invention provides an area grain combine harvester which comprises a walking device, a pneumatic assisting header device, a threshing device, a cleaning device, a pneumatic conveying device, a bagging device, a hydraulic integration device, a driving operation device and an engine device. The walking device is placed at the bottom end of a whole machine. The pneumatic assisting header device is placed at the front end of the whole machine. The threshing device and the cleaning device are arranged behind the pneumatic assisting header device in sequence. The pneumatic conveying device is communicated with an outlet of the cleaning device. The bagging device is placed at the back end of the whole machine and is communicated with the tail end of the pneumatic conveying device. Conveyed seeds are bagged according to area unit quantity. Each time harvesting in one area is over, a corresponding device is operated to carry out seed clearing under a moving-stopping state, and seed mixing between different areas is avoided. Working efficiency is high, the grain breaking rate and the loss rate are low, inner grains can be cleared easily, seed residues are avoided, and the problem that during harvesting, seed mixing is caused by inner residual seeds of machines between different areas is effectively solved.