The invention belongs to the technical field of agricultural machines, and particularly relates to a corn header, in particular to a multi-section combined ear picking plate type corn header. The multi-section combined ear picking plate type corn header comprises a gearbox (1), a rack (2), a stem pulling roll assembly (4) and a plant dividing chain assembly (6). The gearbox (1) comprises a bulb (10). The rack (2) comprises a main frame (12), a chain protection plate (13) and a chain protection plate supporting plate (14), and a long groove hole (55) is longitudinally formed in the upper surface of the main frame (12); the corn header further comprises a rear ear picking plate assembly (3) and a guide-in ear picking plate assembly (5). A whole ear picking plate section is divided into guide-in ear picking plates and rear ear picking plates, the passing ability of corn stalks is enhanced, and the clamping function of the ear picking plates on the stalks is guaranteed. The ear picking plates on the two sides can be automatically adjusted, and unaligned row harvesting is facilitated. The whole header is small in width, can be manufactured into a narrow-row harvester and can also be manufactured into a wide-row harvester.