The invention provides a rotor structure, a permanent magnet auxiliary synchronous reluctance motor and an electric automobile. The rotor structure includes a rotor body, a plurality of permanent magnet groove groups are arranged on the rotor body, the plurality of permanent magnet groove groups are arranged at intervals in a circumferential direction of the rotor body, the plurality of permanentmagnet groove groups include a first permanent magnet groove group, the first permanent magnet groove group includes a plurality of permanent magnet grooves sequentially arranged outwards in a radialdirection of the rotor body, and a cross section of part of groove segments of at least one permanent magnet groove among the plurality of permanent magnet grooves in the radial direction of the rotorbody is S-shaped. The rotor structure adopting the scheme of the invention effectively improves the magnetic flux generated by permanent magnets of the rotor structure, increases the electromagnetictorque under unit current of a motor with the rotor structure, and increases the efficiency of the motor.