Shifting 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, and relates to the technical field of display, and the shift register comprises a pull-up module which is electrically connected with a first clock end, a first input end and a pull-up node, and is used for controlling the connection and disconnection of the first input end and the pull-up node; the first pull-down module is electrically connected with a first control end, a second input end and a first pull-down node and used for controlling connection and disconnection of the second input end and the first pull-down node. The second pull-down module is electrically connected with a second control end, a second input end and a second pull-down node and is used for controlling connection and disconnection of the second input end and the second pull-down node; and the output module is electrically connected with the pull-up node, the first pull-down node, the second pull-down node, the first power supply end, the second power supply end and the signal output end, and is used for controlling the on-off of the first power supply end and the signal output end and controlling the on-off of the second power supply end and the signal output end. Parameter offset of the device can be avoided, and the reliability of the circuit is improved.