The invention relates to a cable forming device and a cable forming method. A support of a yarn binding machine is fixed on the support I, a hollow shaft of the S/Z yarn binding machine penetrates a bearing arranged on the support of the S/Z yarn binding machine and is connected with an S/Z yarn binding motor through a synchronous belt, one end of a tubular mold penetrates a raised block through hole on the support I and is fixed with a cable forming mold, the other end is fixed with the support I, the support of a taping machine, a speaker hole and a noseplate are respectively fixed on the support II, the hollow shaft of the taping machine penetrates the bearing arranged on the support of the taping machine and is connected with a taping motor through the synchronous belt, a deflector rod of the taping machine is fixed in a rectangular through hole arranged on a disk of the taping machine and movably connected with the rectangular through hole, the taping machine is fixed on the support III, and six pay-off racks are respectively fixed on the ground corresponding to the noseplate. The novel cable forming device is characterized by avoiding structural instability caused by repeated supporting and winding of data wires, ensuring electrical properties of a cable, improving the production efficiency, further saving materials and reducing consumption; and the device is simple in structure, convenient for installation, stable, reliable and good in applicability.