The invention relates to a self-propelled corn harvester. A
cutting platform is hinged at the front part of an automotive
vehicle frame and is provided with a grain lifter, a
cutting knife, a gripping conveyor chain, a snapping roll and a stalk
crusher, wherein the middle part of the frame is provided with a corn ear conveyor, while and the rear part is provided with a fruit ear box, the cross sections of a chute below pressing plates evenly distributed on a cross beam of the
cutting knife and a sliding rod in the chute are mutually matched drum shapes, an anti-attrition lining plate is arranged between the pressing plates and the sliding rod, the snapping roll is arranged on the frame through an unloading sleeve, a
crankshaft in a shell of the
straw grinder is hinged with hammer leaves, a radial material-throwing plate is arranged between the hammer leaves on the
crankshaft, the inner wall of the shell is provided with an upper screw plate and a lower screw plate, and a full rubber corrugated
flange conveying belt is arranged between a driving roller and a driven roller of the core ear conveyor. The sliding rod of the cutting knife is not easy to beat and is advantageous for cutting operations, and the bearing load of an input bearing of the snapping roll is small so that the snapping roll is not easy to be damaged; corn stalk grains after crushing are small and does not influence farming after being applied to fields; and the full rubber corrugated
flange conveying belt conveys corn ears with small
power consumption in the process of conveying the core ears, and is not easy to go wrong.