In view of the negative influence of load torque fluctuation and load moment of inertia exerted on the control performance of permanent magnet synchronous motor, a model reference adaptive control method has thus been adopted to identify the moment of inertia in real time. By using the designed disturbance compensation observer, the load torque value combined with the identified moment of inertia can be estimated, with the observed load torque converted into the observed current value for the error with the given current value. Thus, the feed forward compensation of the control system helps to reduce the torque current ripple, thus improving the anti-interference ability and response speed of the system. Based on the verification of model in the loop physical simulation platform, it is testified that the control strategy has a good effect on the anti-interference performance and response speed of the system, thus enhancing the robustness of the system.