The present disclosure provides a pixel driving circuit and a method for driving the same. The pixel driving circuit comprises: a data signal input unit configured to provide a data voltage; a light emitting unit configured to emit light and display; a light emitting control unit configured to control the light emission of the light emitting unit at a pixel driving display phase; a reference voltage providing unit configured to provide a reference voltage; a driving unit configured to receive the reference voltage provided by the reference voltage providing unit and drive the light emitting unit via the light emitting control unit at the pixel driving display phase; and a threshold voltage compensating unit configured to receive the data voltage via the data signal input unit at an initialization phase, and to store the data voltage and the threshold voltage of the driving unit at an threshold voltage compensating phase, such that the voltage provided to the gate of the driving unit at the pixel driving display phase is able to compensate the threshold voltage of the driving unit and accurately control the driving current of the driving unit.