The application discloses a shifting register unit, a grid electrode driving circuit, and a display. The shifting register unit comprises a first clock signal input end, a four clock signal input end, a pulse signal input end, a signal output end, a driving module, a charging and discharging module, a low level maintaining module, and a low level maintenance enablement module. By means of the superposition of multiphase clock signals, the shifting register unit decreases the positive voltage bias duty ratio of a TFT of the low level maintenance enablement module, and introduces the negative voltage bias time of the TFT of the low level maintenance enablement module. Therefore, the threshold voltage drift of the low level maintenance enablement module is decreased and the stability of a pull-down circuit is enhanced. The grid electrode driving circuit formed by the shifting register unit and a pixel TFT are produced on a display panel together. Therefore, the number of the external pins and the peripheral chips of the display panel is decreased and integration degree of the display panel is enhanced.