Aimed at the problems that as for the aerospace three-stage brushless generators, the builtin voltage is overshoot, the adjustment range is limited, the response is low at speed, and difficult to meet the needs of highquality power supply,a multi-parameter voltage regulation strategy to improve threestage generators based on the improved fractional order control is proposed. Firstly, by increasing the excitation current and load current feedback,multi-parameter voltage regulation is achieved to improve dynamic performance. Second, the improved fractional order PI λ controller is used, and the controller improves the regulation performance during the buildup phase. Finally, the fuzzy rules are introduced into the fractional order controller to make the controller have both dynamic and steadystate performance. In order to effectively verify the rationality of the proposed method, an aerospace threestage brushless generator simulation platform is set up and the related simulation analysis are performed. The results show that compared with the traditional voltage control, the proposed method can reduce the construction pressure overshoot by 6.4%. In the construction pressure and sudden loading and unloading phases, the response time goes down by 42.76%, 37.01%, and 32.88% respectively.