[1] of total energy consumption of national economy. The drying for agricultural products is one of the main fields. High energy consumption is one of the major reasons influencing the development of the drying industry, while the drying for agricultural products is the most important treatment link after harvest in the production process of agriculture and also the important step during the processing of harvesting agricultural products. Especially, the t drying is more important in the production process of grain. The harvested grain can be stored under safe moisture, and most of the harvested grain needs drying so as to reach the storage requirements. Guaranteeing the safety of reserve grain directly concerns national economy and the people’s livelihood. Therefore, from this meaning, the grain drying is more important.