The invention discloses a header of a corn harvesting machine. The header comprises a frame. A cob picking mechanism is arranged on the frame and comprises cob picking channels, corn cobs can penetrate the cob picking channels, dividers are mounted at inlet positions of the cob picking channels, pulling conveyor chains are arranged on two inner sides of each cob picking channel, the corn cobs can be driven by the pulling conveyor chains to move forwardly, two stalk pulling rollers with opposite rotation directions are arranged at the bottom of each cob picking channel and are horizontally parallelly arranged or are staggered from each other at vertical positions, gaps are reserved between every two corresponding stalk pulling rollers, corn stalks can pass the gaps, every two corresponding stalk pulling rollers are provided with conical heads, and spiral flanges are arranged on linear sections and the head of one of the stalk pulling rollers of each cob picking channel; cob containers are arranged below outlet positions of the cob picking channels. The header has the advantages that the header is reasonable and compact in structural design and does not need to be matched with lift conveyors, and the purpose of picking the cobs can be independently achieved; good cob picking effects can be realized, the header is high in efficiency, and service requirements of people can be met.