In recent years, with the rapid development of grain dryers, the level of mechanization of grain drying in the country has increased year by year, which has accelerated the efficiency of grain drying, shortened the time for grain storage, and made farmers no longer rely on the sky for food. "Timely drying and safe warehousing" is a key link in the whole process of grain production mechanization to solve the problem of ploughing and raking. At the same time, grain drying is of great significance to national food security, agricultural production efficiency, agricultural product quality and farmers' income.

The traditional drying method, due to the small drying field, low drying efficiency, poor effect, easy pollution, large loss, and the rapid development of mechanized harvest level does not match. In many areas, the grains harvested by the combine harvester cannot be dried in time, and it is a common phenomenon that a large number of grains are piled together, which is easy to cause heat and deterioration, and greatly reduces the edible taste and seed germination rate. In case of rainy weather, grain is more likely to cause mildew loss.