Provided is a full-speed range control method of a built-in permanent magnet synchronous motor based on a fuzzy controller. The method includes the steps of simplifying a current control strategy of aconstant torque zone and a constant power zone of the built-in permanent magnet synchronous motor, and improving operating speed of a processor in an actual control system; designing a fuzzy logic controller which includes input and output membership degree functions and a fuzzy rule; introducing integral control into a control system to further eliminate steady-state errors. According to the method, the fuzzy logic controller is introduced into the control system, an integral link is added, so that the control system has the advantages of rapid response, insensitivity of parameter variationsand perturbations, low model accuracy requirements, no need of system online identification, simple physical realization and the like, and dynamic response and robustness of the built-in permanent magnet synchronous motor are improved.