Abstract:As the superheated steam temperature object has the characteristic of large inertia,large delay,variable character with the load change,a fuzzy logic self-tuning PID controller based on error integral is designed.After Matlab simulation under multi-situation,whether on speediness response,or on adaptitude and robustness,it is shown that the designed controller has great advantage compared with the traditional controller.With the strong adaptive ability and simple calculation method,the controller is proved to be valuable in real application.