This invention discloses a magnet power machine capable of controlling the start, stop and rotation speed of machines including: a shell with a stator fixed on it, a rotor sleeved in the stator is fixed on the primary shaft, which is flexibly set on both ends of the shell and either the stator or the rotor is composed of several permanent magnet blocks characterizing that an isolation sleeve is set between the rotor and the stator moving between them controlled by the drive device so as to control the position of the sleeve in them to control the action force of the magnetic field on the rotor. |