The invention provides a current control method for a permanent magnet synchronous motor, and belongs to the technical field of current control. The current control method is applicable to performing current control on a current loop in the permanent magnet synchronous motor, and comprises the steps of S1, building a current control model by taking an error parameter as a state variable; S2, observing the error parameter by adopting a first observer so as to acquire the error parameter; S3, processing according to the acquired error parameter and the current control model to acquire a voltage instruction value; S4, observing dead zone voltage of the permanent magnet synchronous motor by adopting a second observer so as to acquire a dead zone voltage value; and S5, performing comparison on the dead zone voltage value and the voltage instruction value, and modifying the voltage instruction value according to the comparison result so as to acquire a modified voltage instruction value. The beneficial effects are that model error compensation and dead zone voltage compensation are added in existing permanent magnet synchronous motor closed-loop current control, and the current control accuracy is effectively improved.