The invention provides a GOA circuit, other than the first to the fourth GOA units, in each GOA unit: the first pull-down maintenance module receives the first control signal, low voltage signal, scan signal and circuit start signal, and is connected to the first node, wherein the 52nd TFT of the first pull-down maintenance module has a gate connected to the first node, a source receives the circuit start signal, and a drain connected to the gates of the 31st TFT and 41st TFT so that when the first node is at high voltage, the gate-source voltage difference of the 31st TFT and the 41st TFT are both negative to effectively reduce the current leakage and prevent the current leakage from affecting the voltage of the first node, to improve the circuit stability without additional signal lines, able to facilitate production cost reduction and achieving narrow border design.