A pixel circuit and a driving method therefor, a display substrate, and a display device are provided. The pixel circuit includes: a light-emitting control circuit, used to control a potential of a first node in response to a first scan signal from a first scan signal terminal and a data signal from a data signal terminal, output a direct current power signal provided by a direct current power terminal to a second node in response to a light-emitting control signal from a light-emitting control signal terminal, and control switching-on and switching-off between a third node and a light-emitting element; a compensation circuit, used to adjust the potential of the first node according to a potential of the second node; and a driving circuit, used to output a driving signal to the third node in response to the potential of the first node and the potential of the second node.