In order to solve the problems of long drying time and unstable drying performance of corn ear by manual operation, a temperature and humidity control method based on fuzzy control is proposed in this paper. According to the analysis of corn ear drying process, the measured temperature and humidity are selected as fuzzy input variables, and the fuzzy rules are formulated. The fuzzy set of control variables is obtained by fuzzy reasoning, and the accurate control value of ventilation door opening is calculated by the maximum membership average method. The application results show that the control method has good dynamic response, anti-interference ability and robustness. On the premise of ensuring the quality of corn seeds, the drying time is shortened from 72 hours to 60 hours, which improves the work efficiency of the production line and reduces the labor intensity of operators.