Compressor and motor rotor assembly thereof

The utility model discloses a compressor and a motor rotor assembly thereof. The motor rotor assembly comprises a rotor core, balance blocks, an end cover and connecting rivets, wherein the rotor core is cylindrical; the balance blocks are arranged at the upper end face and/or the lower end face of the rotor core; the end cover is arranged between the rotor core and at least one of the balance blocks and comprises a bottom plate and a circumferential wall, the balance block is arranged on the bottom plate and located inside a ring formed by the circumferential wall, the circumferential wall is arranged around the bottom plate and extends towards the direction which is away from the rotor core; and the balance blocks, the end cover and the rotor core are connected through the connecting rivets. The flow resistance loss of the compressor can be reduced according to the motor rotor assembly disclosed by the embodiment of the utility model, and then the energy efficiency of the compressor is enabled to be improved.