Fatigue test device of steel strand inhaul cable for bridge and test method thereof

The invention relates to the technical field of fatigue tests, and discloses a fatigue test device for a steel strand inhaul cable for a bridge and a test method of the fatigue test device. The fatigue test device for the steel strand inhaul cable for the bridge comprises a cross-core type actuator, a reaction frame connected with the cross-core type actuator, a test cable saddle device, a tension loading end anchoring assembly and a tension fixing end anchoring assembly, the cross-core type actuator is arranged on the end side of the reaction frame, the test cable saddle device is arranged in the reaction frame, and the tension loading end anchoring assembly and the tension fixing end anchoring assembly are connected with the cross-core type actuator. And the test cable saddle device and the counter-force frame are connected with the counter-force floor to be fixed. The fatigue test device can simulate inhaul cable fatigue of a part of cable-stayed bridge inhaul cables in a cable saddle bending state and a c