The present disclosure provides a pixel driving circuit, a pixel driving method, a, display panel and a display device. The pixel driving circuit includes a driving transistor, a storage capacitor, a switching control module, a writing control module and a light-emission control module. A gate electrode of the driving transistor is electrically connected to a first electrode of the driving transistor at a threshold compensation stage and a writing stage under the control of the switching control module, so as to write a threshold voltage of the driving transistor into the storage capacitor. A data voltage is written into a second electrode of the driving transistor at the writing stage under the control of the writing control module. According to the present disclosure, the threshold voltage of the driving transistor and the data voltage from the data line are separately written into the storage capacitor through the switching control module and the writing control module, so as to enable a driving current of the driving transistor to be independent of the threshold voltage of the driving transistor. In addition, a reference voltage is written into a second end of the storage capacitor at the writing stage through the writing control module, and the driving current of the driving transistor is enabled to be independent of an on-state voltage of a light-emitting element at a light-emission maintenance stage.