Switch reluctance motor is a simple structured and rugged motor; it has high torque and speed capabilities, and is suitable to operate in harsh environment. When the rotor of a SRM is skewed, its structure resembles the impeller of an axial flow pump. Based on this observation, a switch reluctance motor-pump is proposed and its design method is presented in this paper. A conventional 6/4 pole SRM is designed first. Then, the stator and rotor are skewed with the same angle. Inductance waveforms for various rotor shape and tooth thickness are analyzed. A final design is selected with the least reduction in torque capability comparing to the original SRM. Finally, experimental results have verified the feasibility of motor-pump design.