A heating circuit of a power battery is provided. The power battery includes a first battery core group and a second battery core group connected in series. The heating circuit includes an inverter, an alternating current motor, and a first controller. A neutral point of the alternating current motor is connected to a first connection point between the first battery core group and the second battery core group. The first controller is configured to input a driving signal to control the inverter to alternately connect the first battery core group to the alternating current motor and the second battery core group to the alternating current motor, to cause the first battery core group and the second battery core group to charge each other.