Energy-saving drying device for agricultural granary

In order to solve the problem that unnecessary troubles may be caused by forgetting to close the drying device, the agricultural granary energy-saving drying device comprises a drying pipe fixedly installed on the wall of a granary, a drying wind wheel rotatably installed in the drying pipe, and a receiving belt wheel fixedly installed on the drying wind wheel through a shaft. The device is characterized in that the operation condition of the device is automatically controlled according to weather conditions, when the weather is cloudy and rainy days, the air temperature is low, the dry ventilation mechanism is closed to prevent humid air from entering the granary, when the weather is sunny, the ventilation device is opened to ventilate the granary, and generated kinetic energy is generated by collecting the sun to heat and collect rainwater; the solar energy collecting plate can be folded in windy and rainy days to reduce wind resistance and can be unfolded in sunny days to increase the collecting area.