Shifting register unit, driving method, driving circuit and display device

The invention provides a shift register unit, a driving method, a driving circuit and a display device. The shift register unit comprises a first node control circuit (11), a second node control circuit (12), an output node control circuit (13), an output circuit (14), a holding circuit (15) and a potential control circuit (16), the first node control circuit (11) controls the potential of a first node (n1), the second node control circuit (12) controls the potential of a second node (n2), and the output node control circuit (13) controls the potential of an output node (n5); the output circuit (14) controls the output end (E1) to be communicated with the first voltage end (V1) under the control of the potential of the output node (n5); the potential control circuit (16) controls the potential of the control end of the holding circuit (15) according to the second clock signal; the holding circuit (15) controls the output end (E1) to be communicated with the second voltage end (V2) under the control of the pot