The invention discloses a birotor permanent magnet synchronous reluctance motor and a configuration method. A rotating shaft, a reluctance rotor, a stator and a permanent magnet rotor are sequentiallyarranged from inside to outside, wherein stator grooves are uniformly formed inside and outside the stator, the stator is arranged between the permanent magnet rotor and the reluctance rotor, a d axis is defined as a center line of ferrite of the permanent magnet rotor, a q axis is defined as a center line of a salient pole of the reluctance rotor, a mounting angle of the two rotors on the rotating shaft is defined as an included angle between the d axis and the q axis, a superposition mechanism of torque components is changed by adjusting the mounting angle between the permanent magnet rotorand the reluctance rotor, so the permanent magnet torque and the reluctance torque reach the maximum values at the same current phase angle. The motor is advantaged in that on the premise of not increasing mechanical manufacturing and cooling difficulty of the motor, the electromagnetic torque, the power density and the efficiency are comprehensively improved, the torque pulsation and other electromagnetic properties are inhibited, and the rotor is flexible in structural design, simple in machining process and high in mechanical strength.