A pixel circuit and a driving method therefor, and a display panel. The circuit includes: a node control circuit, a driver, a display sub-circuit, a threshold compensator, and a reset device; the node control circuit outputs a reference voltage to a first node, or outputs a data voltage to the first node. The driver outputs a drive current; the display sub-circuit is configured to display a gray scale; the threshold compensator is configured to adjust a voltage of a second node to the sum of a voltage of a first level terminal and a threshold voltage of the driver, and adjust the voltage of the second node to a difference between the sum of the voltage of the first level signal, the threshold voltage of the driver, and the reference voltage and the data voltage; and the reset device is configured to reset the second node and the display sub-circuit.