The sensorless technology cannot directly obtain the absolute position of the permanent magnet linear synchronous motor (PMLSM) mover, and the mover position is estimated by integrating the speed. However, the speed is estimated by sensorless technology, and there is still a slight error between the actual speed. With the continuous movement of the motor, the accumulated deviation eventually causes the deviation between the estimated position and the actual position to diverge, or even make the position servo system based on sensorless control collapse. A new low-cost, high-precision position correction strategy is proposed, and the simulation verification is conducted. The simulation results show that this strategy improves the accuracy of the position estimation results and eliminates the risk of sensorless position servo system breakdown due to accumulated deviations.