Abstract: In the process of developing a magnetic levitation fast permanent magnet motor rotating body, it is necessary to measure the natural vibration frequency of the rotating body to ensure its operation within a safe speed range and avoid resonance. This paper conducts modal analysis on the rotating shaft of a maglev high-speed permanent magnet motor. Firstly, a rotor model is established using UG software, and then the modal is evaluated using ANSYS Workbench software to obtain the natural frequency and mode of the rotor. In experiments, the natural frequency of the rotor is measured using LMS hammering technique and the experimental results are compared with simulations. These studies provide a theoretical basis for preventing resonance and optimizing the structure.