Abstract: In order to realize the high-performance position control of permanent magnet linear synchronous motor (PMLSM) servo system and overcome the problem that it is easily affected by the factors such as system parameter change and external disturbance, a nonsingular fast terminal sliding mode control (NFTSMC) strategy based on the fuzzy disturbance observer (FDO) is proposed. Firstly, the dynamic model of PMSLM with uncertain lumped disturbances is established, and a fuzzy disturbance observer is introduced to observe the lumped disturbance of the system to improve the robustness of the servo system and weaken the chattering phenomenon at the same time. Secondly, a nonsingular fast terminal sliding mode surface is designed which can ensure that the tracking error of the system converges to zero quickly in a finite time, and the estimation of the observer value is compensated to the controller. Finally, it is demonstrated through simulation and experiment that the proposed method can effectively improve the response speed, tracking accuracy and robustness of the control system, and at the same time weaken the chattering phenomenon.