Abstract: To solve problem of corn harvesting under different row spacing condition, a technology about ear snapped after stalk cutting and conveying was proposed, and adaptability for row spacing was enhanced by the technology. Corn harvesting device with finger wheel was designed and fabricated by optimization of finger wheel, blades and snapping unit. Through the analysis of key technologies, technology conditions of corn stalk dividing, feeding and conveying were determined. The field tests were conducted in the corn planting areas of northeast of China and Huang-Huai-Hai District. Experiment results showed that all the specifications were met with national standards, row spacing ranged from 300 mm to 800 mm. It is very important to cross regional operation of corn harvester, increase the utilization of corn harvester and enhance the income of owner.