Abstract: At present, the lack of fitting farmer family-type drier in China, a kind of box-style solar drier with accessorial thermal energy designed. The drier includes drying box, thermal wind stove and circle system. The thermal parameters of the solar drying with accessorial heat present nonlinear, large-lag, time-variable and model uncertainty in drying process. A kind of fuzzy adaptive PID controller was designed. The simulated results show that the controller has excellent dynamic, steady and anti-jamming performance than traditional PID controller, such as the index of overshoot value and regulating time. It can well meet the temperature control requirement of solar drying system.