Pixel circuit and driving method thereof, display panel and display device

The invention discloses a pixel circuit and a driving method thereof, a display panel and a display device. The display panel comprises a driving module, a data writing module, a threshold compensation module, a first reset module, a power supply writing module, a light-emitting control module, a light-emitting module and a storage module, wherein the data writing module comprises a first sub-module and a second sub-module, and the threshold compensation module comprises a third sub-module and a fourth sub-module; the control ends of the power supply writing module, the light-emitting control module, the second sub-module and the threshold compensation module are electrically connected with a light-emitting control signal line, and the control ends of the first sub-module and the first reset module are electrically connected with a scanning signal line. According to the embodiment of the invention, the space required by the pixel circuit can be reduced, and the high resolution of the display panel is facilita