The invention relates to an electrode lug reinforcing and indentation mechanism. The mechanism is characterized by comprising a second shaft and a fourth shaft, wherein the second shaft and the fourth shaft can rotate in the opposite directions, and the shaft end of the second shaft and the shaft end of the fourth shaft are power input ends; the two ends of the second shaft are rotationally installed in a first bearing pedestal and a second bearing pedestal correspondingly, and the two ends of the fourth shaft are rotationally installed in a third bearing pedestal and a fourth bearing pedestal correspondingly; the second shaft is fixedly provided with a driving roller which is rotated along with the second shaft, and the fourth shaft is fixedly provided with a driven indentation roller which is rotated along with the fourth shaft; and the arrangement positions of the driving roller and the driven indentation roller correspond to electrode lugs on an electrode piece, the roller face of the driven indentation roller or the driving roller is provided with a protruding embossing capable of pressing indentations on the electrode lugs, and the roller face of the driving roller and the roller face of the driven indentation roller are matched to press indentations on the electrode lugs. Indentations can be pressed on the electrode lugs, the electrode lugs can be normally wound along with the electrode piece, and the phenomenon that the electrode lugs are damaged by being impacted or folded is avoided.