The embodiment of the invention discloses a common voltage calibration circuit, a circuit board and a display device and relates to the technical field of display. The precision and stability degree of common voltage which is actually input to a common electrode can be improved. The common voltage calibration circuit comprises a differencing module, an integral module, a compensation module and asummation module; the input end of the differencing module is connected with the input end of the common voltage and the feedback end of the common voltage, the differencing module is used for acquiring a voltage difference value of the input end of the common voltage and the feedback end of the common voltage, and the voltage difference value is output through the output end; the input end of theintegral module is connected with the output end of the differencing module, the output end of the integral module is connected with the input end of the summation module, and the integral module isused for controlling the precision of the common voltage; the input end of the compensation module is connected with the output end of the differencing module, the output end of the compensation module is connected with the input end of the summation module, and the compensation module is used for compensating the common voltage; the output end of the summation module is connected with the outputend of the common voltage, and the summation module is used for overlapping and outputting results output by the integral module and the compensation module.