Abstract: Because of permanent magnet on stator and low cost of rotor, bearingless flux-switching motor is especially suitable for disposable applications and some high temperature fields, such as medical treatment and biochemical process. In this paper, the levitation principle of bearingless flux switching motor was firstly studied. Based on that, the relationship between the air gap and levitation forces characteristics was investigated. The result shows the distorted force characteristics, leading to difficulty of control effort. Aiming at improving the levitation force characteristics and simplifying the control, an optimization topology was introduced in this paper. Theoretical analysis indicates that the even harmonics and DC component are greatly reduced in the optimization structure. Then the mathematical model was deduced. The optimization effect and control strategy was verified by FEM. FEM result also shows good decoupling performance between torque and levitation forces. Finally, a prototype was manufactured. The torque performance was tested by experiments and stable levitation was implemented successfully.