The main function of the one-line pay-off rack is to pay out the wire from the reel evenly and stably, and accurately supply it to the downstream processing equipment, to ensure smooth transmission of the wire during the production process, and to avoid problems such as wire knotting, entanglement, tension fluctuations, etc. It is equipped with a tension control system to adjust and control the tension of the wire during the pay-off process. Excessive tension may cause the wire to break, while too little tension may cause the pay-off process to be not smooth. The tension control system monitors the state of the wire in real time through the tension sensor, and automatically adjusts the pay-off speed as needed to ensure that the wire is always in the tension state. During the pay-off process, if the wire is over-tensioned, knotted, offset, etc., it may cause damage to the wire or deterioration of its quality. The one-line pay-off rack can effectively reduce the occurrence of these problems through optimized guidance and tension control systems, thereby protecting the wire and ensuring its quality.