Shift register and driving method thereof, gate driving circuit and display device

The invention provides a shift register and a driving method thereof, a gate driving circuit and a display device. The shift register comprises an input circuit, an output control circuit, a first output circuit and a second output circuit. The input circuit controls the level of the first node under the control of the second clock signal. The output control circuit controls the level of the second node under the control of the level of the first node. The first output circuit controls the level of the third node under the control of the level of the second node and a first clock signal, and outputs a first output signal at a first output end. The second output circuit is controlled by the level of the third node, and a second output signal with the level opposite to that of the first output signal is output at the second output end.