Aiming at the problem of large startup initial mover position detection error (+/-30° electrical angle) of the switch Hall method for the permanent magnet linear servo system, a new pulsating high-frequency voltage signal injection and forward-reverse voltage pulse vector injection combined method was proposed. By demodulating the high-frequency current response signal, closed-loop position resolve and phase compensation, the rapid and high-precision initial mover position detection is achieved. The simulation results show that the proposed method can realize rapid initial mover position detection, and the error does not exceed +/3° electrical angle. The detection error is reduced by 90% compared with the Hall initial position detection method, then the startup smoothness of the permanent magnet linear servo system will be improved further.