Aiming at the difficulty of cable force monitoring in the construction and operation stages of large-span spatial cable structures, based on the strain-sensitive characteristics of fiber grating, an intelligent cable embedded with large range of fiber grating sensors is developed by using the "prestress principle" and groove packaging technology, which solves the defects of easy fracture and insufficient monitoring range of fiber Bragg grating sensors in engineering applications. On this basis, the main sensing performance indexes of the intelligent cable are verified by the tensioning test. The results show that the monitoring sensitivity of the fiber grating sensor is about 0.002 66 nm/kN and the linearity error is ≤2.86%, the hysteresis error is ≤1.53%, the repeatability error is ≤2.40%, the total accuracy is ≤4.03%, and the monitoring range can reach 80% of the ultimate bearing capacity of the cable. By using this technology, the construction tension of the cable network structure of a sports stadium is monitored in real-time by using fiber Bragg grating sensor, and the monitoring load of fiber Bragg grating sensor is compared with the tension load of the jack, and the error between the two is only 2.95% after the cable tension is completed. This technology enables high precision cable force monitoring through the full life cycle of the cable.