The stator inductance of high-speed permanent magnet synchronous motor is small and the stator current harmonics are large, so in order to suppress the stator current harmonics, an LC filter is usually added between the inverter and the motor. Although the LC filter can suppress stator current harmonics, it can cause LCL resonance. In order to solve the above problems, this paper proposes an active damping resonance suppression method based on motor current feedback. Firstly, the motor current is sampled, and the feedback gain is determined according to the resonance suppression effect. Secondly, the advanced phase compensator is designed to compensate for the digital control delay. The simulation results show that the proposed method can effectively suppress LCL resonance.