We can know grain dryer on the contrast, because of its widely use, technical features that will show grain dryer, many production activities in the figure, but also because of the occupation with multiple identities makes different people know of occupation in the dryer is not the same. The research on grain dryer machine operation degree depends now the use of the breadth of the above, from the microscopic to research into how to make use of the dryer machine more widely, and discuss the technique principle on the grain dryer machine on the lack of proper depth, such a situation can be roughly summarized the current situation about the dryer machine of the study, and the face of the present technology whether it is tough, operating efficiency, energy saving and environmental protection are still, so as to improve the dryer machine we need to deepen the research of the technology, the deepening of the dryer, so as to carry out such a method, that is also very good for us.