Rotor punching sheet, rotor and motor

The invention provides a rotor punching sheet, a rotor and a motor, the rotor punching sheet is provided with a plurality of magnetic poles, and each magnetic pole is provided with two magnetic steel grooves; the two magnetic steel grooves in each magnetic pole are symmetrically arranged relative to the radial center line of the magnetic pole where the magnetic steel grooves are located. Each magnetic steel groove is provided with a first linear long edge and a second linear long edge which are opposite and arranged in parallel, one side, close to the first linear long edge, of each magnetic steel groove is provided with a magnetic isolation hole group, and the two magnetic isolation hole groups in each magnetic pole are symmetrically arranged about the radial center line of the corresponding magnetic pole; each magnetism isolating hole group comprises a triangular magnetism isolating hole and a quadrilateral magnetism isolating hole, and the quadrilateral magnetism isolating holes in the magnetism isolating