A common electrode drive circuit for a liquid crystal display, comprising a plurality of output terminals connected to a plurality of common voltage input terminals of a common electrode layer of the liquid crystal display and adapted for inputting common voltages into the plurality of common voltage input terminals, the common electrode layer driving liquid crystal together with pixel electrodes of the liquid crystal display. The common voltages input by the plurality of output terminals decrease gradually from a data-line beginning end for data signal input to a data-line tail end for data signal input of the liquid crystal display.