The invention discloses an electrode device for cleaning galvanized cold rolled sheet steel. The electrode device comprises electrodes, electrode transmission plates, electrode fixing racks, a cleaning groove and guide rollers, wherein the electrode transmission plates are welded to the electrodes which are fixed on the electrode fixing racks, the electrode fixing racks are mounted in the cleaning groove, one of the guide rollers is mounted at the bottom of the cleaning groove and two of the guide rollers are mounted at the opening of the cleaning groove, the two electrode fixing racks are vertically mounted as a group, and the two groups of the electrode fixing racks are fixed in the cleaning groove in parallel; two electrodes are fixed up and down on the same electrode fixing rack; the two electrodes are then led out of the cleaning groove through the electrode transmission plates respectively; the electrode transmission plates of the upper and lower electrodes on the same side are connected with the positive and negative electrodes of a direct current power supply respectively. The device provides the electrode device, wherein four electrode plates (positive electrode, negative electrode, negative electrode and positive electrode) are vertically arranged, and a protective layer is arranged on each of the electrode transmission plates for protection, so that the service lives of the electrodes are prolonged.