The invention discloses a
power transmission system of a corn harvester, wherein the
power transmission system comprises a walking
power transmission unit and a working power transmission unit arranged on a
chassis frame; the walking power transmission unit comprises an engine, a driving axle, a steering axle, a four-wheel-drive gear box and a transmission mechanism; a first output shaft of the engine is connected with the driving axle through a first transmission
assembly, the four-wheel-drive gear box is arranged at the bottom of the driving axle, and the output end of the four-wheel-drive gear box is connected with the input end of the steering axle through the transmission mechanism in a transmission manner. The working power transmission unit comprises a
cutting table and field returning transmission mechanism, a lifter transmission shaft, a main transmission second shaft, a main transmission first shaft and a peeling
machine transmission mechanism; the
cutting table and field returning transmission mechanism comprises a
transfer case group, filed returning cutter shafts distributed on the bottom of the front side of the
transfer case group, a
cutting table and field returningvariable speed device distributed below one side of the
transfer case group, and a cutting table packing
auger shaft distributed behind the transfer case group. The peeling
machine transmission mechanism comprises a spike peeling input transverse shaft, a peeling roller shaft group and a spike dialing shaft group.