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

A shift register unit, comprising a first sub-circuit, a second sub-circuit, and a leakage prevention circuit, wherein

• the first sub-circuit comprises a first input circuit and a first output circuit, the first input circuit is configured to control a level of a first node in response to a first input signal, and the first output circuit is configured to output a shift signal and a first output signal under control of the level of the first node;
• the second sub-circuit comprises a second input circuit and a second output circuit, the second input circuit is configured to control a level of a second node in response to the first input signal while the first input circuit controls the level of the first node, and the second output circuit is configured to output a second output signal under control of the level of the second node;
• and
• the leakage prevention circuit is connected to the first node, and is configured to control a level of a leakage prevention node under control of the level of the first node, so as to turn off a circuit connected between the first node and the leakage prevention node and turn off a circuit connected between the second node and the leakage prevention node.