The present invention discloses a method for repairing a display panel, in which a path for electrically connecting two ends of an opened data line at an opened part thereof is formed by using first line segments and a first common electrode, wherein each of the first line segments is a part of one of common electrode lines in the display panel intersecting the opened data line, and the first common electrode is one of a plurality of common electrodes in a pixel array that is electrically connected with the first line segments. Further, a welding process is performed at an intersecting region between the first line segments and the opened data line to form an electrical connection, and electrical connections between the path and other common electrode lines and other common electrodes outside the path are cut off. This method for repairing data lines employs existing common electrode lines and common electrodes to repair an opened data line, so that no additional repairing line needs to be disposed in the display panel to facilitate a narrow bezel design of the display panel and thus repairing the data lines is no longer limited by the number of the repairing lines. Furthermore, the influence on data signals is negligible because no new line is introduced.