A combine-harvester (2) for corn that includes: - a harvesting head (4) to feed with the crop a rotating mowing cylinder (10) during the progress on the ground, stretching the harvest mowing cylinder through of mowers in the opposite direction to the gear to deflect the panicles and to forward the waste without differentiating to an auxiliary hitting cylinder (20) that throws said waste in the direction of an exit in the back； - at least two oscillating sieves (15, 16), one above the other, to throw the grains mixed with small vegetable residues； - a fan (17) adjacent to the sieves (15, 16) to generate a flow of clean air that blows transversely on the grains that fall from the upper sieve (15), and that also blows on the undifferentiated waste to help its displacement towards the discharge outlet； - a deflector panel (21) positioned beyond the auxiliary striking cylinder (20), inclined with respect to the vertical direction at an angle that deflects said waste without differentiating in the direction of another oscillating sieve (22) located below and actuated when the air flow generated by the fan (17) occurs； - a transverse conveyor screw (23) located below the other screen (22) to intercept the entire cobs that pass through and place them in a conduit (25) of pneumatic transport means； characterized in that it also includes: - a crushing device (27, 41, 42, 43) adjacent to the transverse conveyor screw (23) to intercept the corn cobs discharged by the conveyor screw, the crushing device including a rotor (27) holding a blade and a fixed wall (43) supporting the blades (42) in the opposite direction that together define the initial section (51) of said duct (25), - a pneumatic fan (28) in fluid communication with said duct ( 25) to admit the chips or corn cob chips thrown by said rotor (27) into the duct (25) and expel them out of the delivery mouth into the air flow to the outlet of said duct (25).Una cosechadora-segadora (2) para maíz que incluye: - una cabeza
