Abstract: In order to accurately measure the dynamic tension of the wire rope, this paper introduced a system for monitoring tension online of multi-rope friction hoist based on wireless transmission. The system arranges the pressure sensor inside the gasket of the hoist rope groove, and obtains the tension signal of the wire rope by measuring the pressure of the wire rope to the gasket. The tension signal is sent to the computer through wireless transmission, and the tension of the wire rope is displayed in real time by using LabVIEW software programming. Through on-site industrial experiments, the system can monitor the tension balance of the wire rope in real time and judge whether it is overloaded. The system is easy to install, high in detection accuracy, safety and reliability.