Static load bending test device and test method for prefabricated concrete segment assembled simply supported beam

The invention relates to the technical field of concrete structure bearing capacity testing, and provides a static load bending test device and test method for a prefabricated concrete segment assembled simply supported beam, and the test device comprises a counter-force beam, a plurality of groups of load adjusting assemblies, two groups of supporting assemblies and a plurality of groups of rotation adjusting assemblies; the counter-force beam is arranged above the simply supported beam, and the multiple sets of load adjusting assemblies are arranged between the counter-force beam and the simply supported beam. The two supporting assemblies are arranged at the bottoms of the two ends of the simply supported beam correspondingly, and each supporting assembly is connected to the end of the corresponding side of the counter-force beam through the pull rod assembly. The multiple sets of rotation adjusting assemblies are arranged between the counter-force beam and the load adjusting assembly in a one-to-one corre