The embodiment of the invention provides an overhauling method of a mask plate and relates to the technical field of display, aiming at prolonging the service life of the mask plate, avoiding the production cost from being increased and improving the production efficiency. The method comprises the following steps: determining an abnormal position of a metal plated layer of the mask plate and determining the coordinate of the abnormal position; coating repairing glue on the abnormal position so as to enable a glue coated plane to be leveled with a plane of the metal plated layer of the mask plate, wherein the repairing glue comprises a metal material; and curing the repairing glue. The overhauling method can be used for overhauling the mask plate.