The invention discloses a birotor combination power magneto inductor comprising inner and outer magneto inductors of radial magnetic structure, which comprise inner motor components formed by a input shaft, a inner rotor armature winding, a iron core of inner rotor, a iron core of outer rotor and a magnet steel of outer rotor; a outer motor components formed by a stator winding, a iron core of stator, a iron core of outer rotor, and a magnet steel of outer rotor. Wherein, the iron core of inner rotor is mounted and rotated on the input shaft; the iron core of stator is mounted on the housing; the iron core and magnet steel of outer rotor have rigid connection and rotate with the output shaft, while they are used by both inner and outer motor to via the coolant enter the cooling channel between the iron core of inner rotor and the input shaft, for cooling the iron core of inner rotor. The invention has lower cost, lower weight, tight structure, and better cooling effect.