Abstract: Mechanized harvesting of corn grain is a key to realize full mechanization of corn.It involves some relevant links and departments such as variety breeding，cultivation management，agricultural machinery，grain acquisition and drying.In this system engineering，the close cooperation of all links，departments and researchers is needed in order to better realize the full mechanization of corn.According to present situation and existing problems of grain mechanized harvesting in Yili valley，some corresponding solutions were put forward through systematic analysis and consideration of all relevant links，departments and researchers in the system.So that they can cooperate closely and develop together.It would help to realize full mechanization of corn to provide protection，and it would accelerate process of full mechanization of local corn.