Abstract: The paper analyzed working principle of permanent magnet linear motor with moving coil, gave mathematical model of permanent magnet linear motor with moving coil which is used to drive electro-hydraulic proportional valve, and built simulation model of the motor with Matlab/Simulink software. The simulation result showed that regulating time of step response of the motor is less than 30 ms when displacement instruction is 5 mm, which has good dynamic response characteristics of high-frequency.