A pixel driving circuit is disclosed, including: a driving switch, connected between a driving power source and an OLED; a first switch, connected between the source and drain of the driving switch, and being a transistor of the same model as the driving switch; a control circuit, connected between the drain and source of the first switch, for inputting a first control signal and outputting a compensation current to compensate threshold voltage drift of the first switch; a storage unit, connected between the source of a second switch and gate of the first switch, for storing a compensation voltage of compensation current compensating the first switch; the gate of second switch being for inputting a second control signal and the drain for inputting a data signal, the storage unit being for storing a data voltage generated by the data signal. A display panel and pixel driving method are disclosed.