Abstract: The temperature control of silicon steel industrial annealing furnace has the features of strong coupling， pure lag， multidisturbance. The control method represents the solution of a class of nonlinear control systems. The control object is the temperature control of silicon steel industrial an? nealing furnace, the intelligent learning system based on Double Across Limit Control is introduced and used to solve control problem of this kind of nonlinear system, and the module programming is used to realize the function. The results show the method improves the index of precision and anti-disturbance compared with traditional method of PID control，it is a valid method to solve such problem.

Key words: intelligent learning system, double across limit control, air/gas coefficient