The invention relates to a magnetic-electric type rotation parameter measuring device which comprises a stator and a rotor, wherein the stator and the rotor are coaxially arranged; the rotor comprises a multipole magnetic ring in addition to a rotating shaft; the multipole magnetic ring is fixed relative to the rotating shaft and is coaxial with the rotating shaft; a magnetic field which is changed periodically is generated around the multipole magnetic ring in the rotation process; the stator comprises a magnetic path and a magnetic-electric transducer; the magnetic path is used for gathering the periodically changed magnetic field generated from the multipole magnetic ring and used for conducting the magnetic field to the magnetic-electric transducer; the magnetic-electric transducer is used for inducing the changed magnetic field to form an electric signal which is accordant with intensity variation of the magnetic field. The scheme is simple in structure and high in sensitivity, and problems that a conventional sensor is high in cost and not applicable to a severe environment can be solved.