The invention discloses a shift register unit, a driving method, a gate driving circuit and a display device, and belongs to the technical field of display. The shift register unit includes an input module, a maintaining module, an output module, a resetting module, and a pull-down module. After the input module provides an input signal with the potential, the maintaining module can control the potential of a second pull-up node to be the first potential, enables a transistor of the output module to remain an effective start state under the control of the second pull-up node when the potentialof a clock signal outputted by a clock signal end, and timely output the clock signal to the output end as a drive signal. Moreover, because the potential of the second pull-up node at the output stage is more stable, the load of the output end cannot be increased, and the time when the potential of a drive signal outputted by the output module changes to the first potential can be guaranteed tobe shorter, thereby guaranteeing the timely charging of all pixels in a display region, and improving the display quality.