In view of the existing problems of the rotor permanent magnet typed arc motor and the deficiencies of the existing research on the arc motor, an arc linear flux switching permanent magnet motor using the stator permanent magnet structure and reluctance rotor is proposed in this paper. Key problems of the operation mechanism, circumferential end effect and water-cooling structure design are studied. The unique circumferential end effect of the arc motor, and the asymmetric problems of the winding inductance and circumferential end leakage reactance are analyzed based on the equivalent stator circuit. The asymmetric parameters are balanced by the methods of auxiliary teeth and interchanged winding, and the constraint of the rotor pole number is given. Finally, a bidirectional waterway structure suitable for the arc stator is designed to improve the thermal reliability of the proposed motor. The stator temperature difference in the circumferential direction can be effectively balanced by this structure.