The invention discloses a surface-built-in mixed speed-regulating permanent magnet synchronous motor. The surface-built-in mixed speed-regulating permanent magnet synchronous motor comprises a stator core, three-phase armature windings, a rotor core, and a rotating shaft, and the surface and the inner part of the rotor core are respectively provided with surface permanent magnets and built-in permanent magnets along the axial direction. According to the surface-built-in mixed speed-regulating permanent magnet synchronous motor, the process is simple, and the realization is facilitated; through mutual cooperation of the surface permanent magnets and the built-in permanent magnets, magnetic leakage generated by a built-in permanent magnet magnetic pole structure can be reduced, the weak-magnetic resistant performance of magnetic poles of the surface permanent magnets is enhanced, defects of respective structures are overcome, and the comprehensive performance of the speed-regulating permanent magnet synchronous motor is enhanced.