Abstract: Solar cycle drying converts solar heat into the heat required in the drying process through a cycle system, which is particularly suitable for drying materials such as agricultural products, food, wood and textiles. This paper designs a solar heat recycling and control system is designed to realize the continuous and cyclic drying of agricultural products. The performance and efficiency of the circulating dryer were evaluated through experiments, and the results showed that the dryer could effectively reduce humidity and complete the drying process in a short time under the condition of solar input. The research results can provide new ideas and methods for the application of solar energy utilization in the field of drying.