The embodiment of the invention provides a pixel circuit, a drive circuit, an array substrate and a display device and relates to the technology of organic light-emitting diode display. A signal synchronized with pre-charged control voltage and opposite to the pre-charged control voltage in direction is input to the input end of light-emitting working voltage, so that when the pixel circuit enters a light-emitting state, voltage is offered to the circuit through the light-emitting working voltage, stable output of the current of the circuit in the light-emitting stage is guaranteed, the externally-connected voltage input end influencing the aperture ratio does not need to be arranged, therefore, stable output of the current of the current drive circuit is guaranteed, the aperture ratio of an OLED with the pixel circuit driven by the current is increased at the same time, and the service life of the OLED with the pixel circuit driven by the current is prolonged.