Aiming at the problem that it is difficult for the general PID control algorithm to adjust the three parameters of PID online, the fuzzy autotuning method of PID control parameters is studied, that is, according to the fuzzy relationship between the deviation and the deviation change rate and the three parameters of PID, the parameter fuzzy autotuning is carried out. The method has the characteristics of versatility and adaptability, easy parameter tuning, and good control effect. And applied to WK-1 temperature control system, real-time control experiment was carried out, and a good control effect was achieved.