The invention discloses a sheet-fed printing material cold-waving membrane-saving unit, a cold-waving method thereof and a sheet-fed printing material cold-waving membrane-saving device. The sheet-fed printing material cold-waving membrane-saving unit comprises an unwinding mechanism, a winding mechanism and a control system. The unwinding mechanism comprises an unwinding roller used for unwinding at least two rolls of cold-waving membranes, and at least two first traction mechanisms used for traction of corresponding rolls of cold-waving membranes. The winding mechanism comprises a winding roller used for winding at least two rolls of cold-waving membranes. The unwinding roller and the winding roller are both slip frequency shafts. The unwinding mechanism, the winding mechanism and the first traction mechanisms are electrically connected with the control system. By means of the sheet-fed printing material cold-waving membrane-saving unit, the cold-waving method of the sheet-fed printing material cold-waving membrane-saving unit and the sheet-fed printing material cold-waving membrane-saving device, an existing whole-breadth cold-waving membrane which is used can be divided into multiple rolls of independent cold-waving membranes, each roll is independently driven, the cold-waving membranes can be effectively saved, aluminum resources can be effectively saved, and the material cost is reduced.