The utility model discloses a self -starting permanent magnet synchronous motor's rotor, including squirrel cage, rotor core and permanent magnet, the permanent magnet equipartition that the cross sectional shape is tile shape is in in the arc wall on the rotor core outer peripheral face, the radian of arc wall is the same with the radian of rotor core's excircle, partly equipartition of squirrel cage cage strip is in rotor core outer fringe department between the permanent magnet terminal surface, another part cage strip equipartition is in on the inboard rotor core of arc wall, be equipped with relative and match with a key groove on global and the rotor core's of pivot the pore wall respectively, the formation squirrel cage is connected with two end links respectively in the both ends of each cage strip, rotor core is equipped with not magnetic materials layer of on -conductive on global between the outer peripheral face of permanent magnet and the permanent magnet terminal surface. The utility model has the advantages of operating efficiency height, energy -conservation and good the showing of manufacturability.