The invention discloses a pixel circuit, an organic electroluminescent display panel and a display device, which comprise a driving transistor, a light-emitting device, a reset control module, a compensation control module, a data writing module, a light emission control module and a voltage regulator module. Due to the fact that the compensation control module in a pixel device is capable of compensating drift of a threshold voltage, working currents for driving the light-emitting device to light in the driving transistor is made to be only related to voltage of a data signal and a reset signal regardless of the threshold voltage and a second voltage source. As a result, effects of the threshold voltage and resistance drop on currents flowing through the light-emitting device are avoided, the working currents for driving the light-emitting device to light are consistent, and uniformity of brightness of the image in a display area of the display device is improved.