Motor rotor and motor with same

The invention provides a motor rotor and a motor with the same. The motor rotor comprises a shaft body assembly which comprises a first shaft body and a second shaft body, the first shaft body comprises a shaft body and a convex column arranged on the shaft body, the second shaft body and the shaft body are oppositely arranged and surround to form a mounting space, and the second shaft body is provided with a concave part; the annular magnetic steel is located in the installation space, the annular magnetic steel is arranged on one part of the convex column in a sleeving mode, and the other part of the convex column extends into the concave part and is in interference fit with the concave part; and the central axis of the concave part, the central axis of the convex column and the rotation axis of the motor rotor are coaxially arranged. According to the invention, the problem that the coaxiality of the front and rear short shafts of the motor rotating shaft is difficult to guarantee in the prior art is effect