The invention discloses a pixel circuit driving method, a driving device and a display device. In the prior art, in a displaying process, a detection transistor and a driving transistor have step voltage self, source voltage of the driving transistor can be raised, and current driving a light emitting diode to emit lights is not a theoretical value and namely is shifted. The method disclosed by the invention comprises the following steps: according to relation, obtained in advance, between driving voltage corresponding to each gray scale data and a corresponding voltage compensation value, compensating the driving voltage corresponding to to-be-displayed gray scale data by utilizing the determined voltage compensation value, taking the driving voltage corresponding to the gray scale data after compensation as a new driving voltage corresponding to the gray scale data to drive the light emitting diode to emit lights, and influence of voltage drop caused by the detection transistor and the driving transistor is eliminated, so that the problems that the current driving the light emitting diode to emit lights is not the theoretical value due to the voltage drop caused by the detectiontransistor and the driving transistor and luminance of the light emitting diode is unreal in a light emitting process are solved.