The PID control commonly used in adaptive optical correction technology depends on the response model of the deformable mirror,which is susceptible to disturbance,making the calibration process more complex.To address this problem,a fuzzy control method based on variable domain is proposed which does not depend on the response model of the deformable mirror.The residual parameters of the wavefront evaluation index extracted from the Hartmann reconstructed wave front and the residual difference parameters are taken as the input of the fuzzy controller in variable domain,and the proportional integral and differential parameters of the output are self tuned to realize the adaptive control.Matlab is used to compare the variable domain fuzzy control method with the traditional fuzzy control method.The experimental results of wavefront correction show that the wavefront data corrected by the variable domain method is better than that of the traditional fuzzy control method,and the root mean square value of the wavefront residual is also smaller.In the controller system performance experiments,the overshoot of the traditional fuzzy controller is larger,while the overshoot of the variable domain fuzzy controller is almost zero,and the adjustment time is shorter.The variable domain fuzzy control method not only guarantees the robustness of the system and improves the rapidity of the system,while utilizing the characteristics of parameter self tuning to overcome the unfavorable effects of disturbance factors on the response model of the deformed mirror,and improves the correction efficiency,which is more practical for the wavefront correction.