Improving the conventional radial force model for bearingless switched reluctance motor，feedback exact linearization method was applied to decouple and linearize rotor's radial displacement on two degrees of freedom. Sliding variable structure control method was then applied to synthesize the independent linear subsystems coming from decoupling. The simulation results showed that the designed system has excellent decoupling performance, and the system has better dynamic performance and stronger robustness than conventional PID control system.