Abstract: A suspension cable replacement device includes a power unit and a plurality of adjustment units. The plurality of adjustment units is disposed around a suspension cable to be replaced. The power unit is configured to power the plurality of adjustment units. Each adjustment unit includes a support frame, a connector, and a steel strand. The power unit includes two jacks each including a main body. The support frame includes two support columns, a top part, and a bottom part. The top part includes a first through hole, and a nut fixed on an anchor is disposed in the first through hole; a hanger rod is disposed through the anchor and the nut, and fixed in the nut. The bottom part includes a second through hole, and the steel strand is disposed through the second through hole. The connector is disposed in the central cavity of the support frame.