To enhance the reliability, sensorless vector control strategy based on sliding mode observer was adopted in flux-switching permanent magnet machine. The rotor position and speed estimation algorithm was obtained according to the voltage equation on αβ coordinate system of flux-switching permanent magnet machine, which contains the information of rotor positron. Further, a flux-switching permanent magnet machine prototype and its control system were designed. At last, the sensorless control strategy based sliding mode observer was designed and verified well by experiments.