The antidisturbance performance of permanent magnet linear synchronous motor (PMLSM) was weak, and the dynamic performance of the current loop was easily affected by the distortion of magnetic field and the dead zone of the inverter. To enhance the control quality of the current loop, linear active disturbance rejection control (LADRC) was chosen as a closed loop control strategy for qaxis current loop. Considering that the dynamic response of small lag links such as current loop inverter and lowpass filter could not be ignored while tracking high frequency signals, a new twoorder control model of the current loop was derived in the frequency domain by using the method of time domain and frequency domain analysis to link the current loop with the small lag link model, and then a threeorder current loop LADRC system was established in the time domain. An advanced correction link is designed to reduce the control lag caused by the increase of the order, and a detailed parameter tuning method of the control system was given. Compared with the traditional LADRC, simulation results showed that the new LADRC control strategy had better performance in current dynamic following and disturbance rejection, and the control system had good control performance.