The axial vibration suppression strategy of BPMSM based on flux linkage was put forward, the axial offset of the rotor could be evaluated by the calculate the flux linkage of the slice rotor, and based the offset, the reference value of daxial current component (i*d) was given to adjust the axial restoring force of the rotor. The experiment results showed that the proposed the control strategy could suppress the axial vibration of the motor, the system had fine antidisturbance and dynamic permanence.