There are provided a pixel driving circuit and a driving method thereof, and a display apparatus. The pixel driving circuit includes a reset unit 1 configured to write a first power supply voltage of a first power supply voltage terminal into a first terminal of a capacitor; a data writing unit 2 configured to write a data signal of a data signal terminal 7 into a second terminal of the capacitor; a compensation unit 3 configured to provide a reference voltage of a reference voltage signal terminal 6 to a first node S, and write a voltage of the first node S into the second terminal of the capacitor; a light emitting control unit 4 configured to provide light emitting current to a light emitting device 5 for making it emit light, and to reduce the voltage of the first node S.