Provided are a pixel driving circuit, driving method thereof, and a display apparatus. The pixel driving circuit comprises a storage module (1), a light emitting module (2), a driving transistor (TD), and a voltage-adjusting module (3); the storage module (1) is connected to a first control signal terminal (S1), a data current input terminal (1), the driving transistor (TD) and the voltage-adjusting module (3) respectively, and is configured to store a gate-source voltage of the driving transistor (TD) when data current flows through the driving transistor (TD) under the control of a first control signal; the light-emitting module (2) is connected to a second control signal terminal (S2), a power voltage terminal (V1) and the driving transistor (TD) respectively, and is configured to emit light according to the light emitting current (Ioled) in the driving transistor (TD) under the control of a second control signal; the voltage-adjusting module (3) is connected to the second control signal terminal (S2) and the storage module (1) respectively, and is configured to decrease the voltage stored by the storage module (1) under the control of the second control signal to control to reduce the light emitting current (Ioled) in the driving transistor (TD) by a preset scale with respect to the data current (Idata). It is possible to improve display accuracy.