The four-wheel-drive wheel type self-propelled corn harvester can complete corn picking, conveying, peeling, collecting, and straw chopping at one time, and it is compact structure, small turning radius, flexible and operate conveniently. Equipped with a 48kW high-horsepower engine with strong power. The small maize harvester adopted ear picking roller type ear picking device, and low loss grain rate. The reeling chain feeding has reliable operation and strong conveying capacity, which can realize off-line harvesting. The grain tank adopts hydraulic side-turning unloading, which is convenient and quick,and the unloading height is high, which is suitable for various trucks. Hob-type corn straw shredding and returning to the field, with low power loss and high reliability.