The magnetic levitation system of controllable excitation linear synchronous motor has the characteristics of nonlinearity and disturbance uncertainty, and the fuzzy PID control has strong pertinence. However, the fuzzy PID controller is a three-input single-output controller with too many rules, so that the design of the controller is very complex. Therefore, a synthetic fuzzy control system for the controllable excitation linear synchronous motor is proposed. The structure of the motor is studied, and the mathematical model is established. The fuzzy PID controller is composed of fuzzy PD controller and fuzzy integral controller, which can improve the steady-state accuracy of the controlled motor and reduce the number of fuzzy control rules. The fuzzy PD controller and fuzzy integral controller are designed respectively, including fuzzification, fuzzy reasoning, deblurring and so on. The simulation model of the controlled motor is established in MATLAB. The simulation results show that the synthetic fuzzy controller has good control effect, reduces the steady-state error, and improves the control accuracy.