The tea with a coal stove drying machine has high energy consumption, low thermal efficiency problems, mostly adopts manual control, causes the tea drying temperature is not stable, and effect of tea quality stability. Therefore, by using fuzzy control technology to control the temperature of hot air, according to the temperature of hot air from blast furnace, flue gas quantity is adjusted automatically through the inverter, to control hot temperature reaches a constant, to meet the need of drying at the same time, reduce the energy consumption, and ensure the quality of tea. Finally, the of fuzzy PID temperature control system is simulated by of MATLAB software, the results show that the system can effectively control the temperature of hot air, the temperature control of the objective.