Considering that the static tension on the cable will change in real-time due to factors such as waves, subsurface currents, and wind loads when the deep-sea anchor towing machine performs towing operations, and the excessive load of the cable will endanger the safety of the towing machine and even the whole ship, and it is necessary to accurately measure the cable. The static tension is monitored and displayed online so that safety measures such as emergency release can be taken at a time when the cable load exceeds the limit. In this paper, the sensor data is sent to the cable tension measurement system through the LoRa wireless network, and the tension data is monitored in real-time, which can avoid cable breakage and ensure safety.