The invention discloses a GOA unit, a driving method thereof, a GOA circuit and a display device and belongs to the display technical field. The GOA unit includes a buffer module, module, a pull-up module, a pull-down module, a holding module, a charging and a discharging module; the buffer module is connected with a signal input end and a pull-up node; the pull-up module is connected with a first clock signal end, the pull-up node and an output signal end; the pull-down module is connected with the output signal end, a reset signal end and a power source signal end; the holding module is connected with the first clock signal end, the power source signal end, the pull-up node, a pull-down node and a second clock signal end; the charging module is connected with the pull-up node and the output signal end; and the discharging module is connected with the reset signal end, the pull-up node, the power source signal end, the pull-down node and the output signal end. With the above technical schemes of the invention adopted, the problem that noises exist on the pull-up node and the output signal end of the GOA unit can be solved, and the noises of the pull-up node and the output signal end can be decreased.