Public voltage adjusting circuit and method and display panel and device

The invention provides a public voltage adjusting circuit and method and a display panel and device. The public voltage adjusting circuit comprises a filtering unit and a control unit, wherein the control unit is used for controlling a public voltage feedback line to be disconnected from the second input end of a public voltage negative feedback amplifying unit and controlling a reference public voltage output end to be connected with the second input end through the filtering unit in the compensation stage, and controlling the public voltage feedback line to be connected with the second input end and controlling a reference public voltage output end to be connected with the second input end in the non-compensation stage. The initial moment of the compensation stage is the moment when a clock signal output by a clock signal line with the distance from the public voltage feedback line being within a preset distance range is located in a rising edge and/or a falling edge, and a preset duration is maintained in