This paper proposes a brushless double mechanical port flux-switching permanent magnet motor (BDMPFSPMM) that this motor is used in fields of high power and hybrid electrical vehicles. In design of this motor is studied the purposes in order to useful and optimum motor design that this is dependent to choice of suitable design variables. Design purposes are maximum mean of torque for inner motor and outer motor and minimum ripple of torque for both of them, for realization this purposes is used genetic algorithm, so that, firstly for setting upper and lower band for all of variable parameters is used sensitive analysis then is used genetic algorithm to solve this problem. All of works is done with Maxwell software used Finite element method (FEM).