Abstract: The traditional excitation control strategy mainly relies on the linear model, which is difficult to effectively deal with the nonlinear disturbance and complex conditions of the power grid. In this paper, the automatic regulation technology of generator excitation system based on fuzzy control is proposed, the fuzzy method of input variables is designed, the multi-objective rule generation mechanism is introduced, and the adaptive regulation framework is constructed by combining the anti saturation reasoning solution and the self correction strategy of excitation parameters. The experimental results show that the technology in this paper has significantly improved compared with the traditional control methods in many aspects, showing its superior performance and application prospects in the complex power grid environment.