The invention discloses a corn harvester which comprises a housing, wherein the middle of the housing is fixedly connected with an automatic corn picking and peeling device; the automatic corn picking and peeling device divides the inner cavity of the housing into an upper cavity and a lower cavity; the upper cavity is a corn storage tank; the lower cavity is a crushed straw storage tank; the left end of the straw storage tank is fixedly connected with a straw harvesting and crushing device; the front end of the straw harvesting and crushing device penetrates through a left side wall of the housing; a cab is integrally formed at the upper end of the housing. The corn harvester adopts tapered blocks, circular cutting saws, a transmission shaft roll and a cutting shaft roll in the straw harvesting and crushing device, so that harvested straws can be crushed; the corn harvester adopts a peeling shaft roll and a driven shaft roll in the automatic corn picking and peeling device to remove skin of corn, so that automatic corn harvesting is realized, and a harvesting rate is accelerated.