The influence of the tilting angle of the circular optical path under the aperture angle on the modulation degree and the phase error is analyzed, and the dynamic calibration scheme is designed. Considering that the traditional proportional-integral-derivative (PID) controller is strictly dependent on the mathematical model of the dynamic correction system, while in the real closed-loop system, some parameters still can’t be accurately obtained. Fuzzy PID control strategy is used, and the fuzzy input and output of membership function is selected after the development of fuzzy rule base, fuzzy reasoning, the closed-loop corrected system is given. According to the experiment, the feasibility of the method is verified, which can effectively get rid of the dependence on the exact mathematical model of the calibration system. It can increases the laser interference modulation degree from 0.6 to 0.99, and the phase difference is reduced to 0.1°, the stability and adjustment time are also much better against the traditional PID controller.