Motor and motor rotor thereof

The invention provides a motor and a motor rotor of the motor. The motor rotor comprises a rotor core, wherein magnetic steel grooves are formed in the rotor core, and magnetic steel is arranged in the magnetic steel grooves. The motor rotor further comprises a snap spring used for limiting the magnetic steel in the magnetic steel grooves, a clamping groove is formed in the end of the rotor core, the clamping groove comprises a clamping connection portion located in the rotor core and a penetrate-out portion extending out of the end of the rotor core from the two ends of the clamping connection portion, a buckle portion matched with the clamping groove is arranged on the snap spring, and the snap spring is fixed to the rotor core through matched connection between the buckle portion and the clamping groove. The motor rotor is simple in structure, the snap spring is reliably fixed, thus, the pressing action of the snap spring on the magnetic steel can be guaranteed, the magnetic steel is better fixed, and the problem that in the prior art, magnetic steel is poorly fixed by a motor rotor is effectively solved.