Static force loading test system

The invention provides a static loading test system, and relates to the technical field of hydraulic systems, and the static loading test system comprises a hydraulic cylinder which comprises a rod cavity and a rodless cavity; a loading pipe group which comprises an oil inlet pipeline connected with the rodless cavity and an oil return pipeline connected between an oil supply pipe and the rod cavity; an unloading pipe group which comprises a first unloading pipeline communicated with the rod cavity and a second unloading pipeline communicated with the rodless cavity; and a control device which is connected with the loading pipe group and the unloading pipe group and is used for controlling the conduction states of the first unloading pipeline, the second unloading pipeline, the oil inlet pipeline and the oil return pipeline according to the state of the tested piece. According to the static loading test system, an unloading protection effect can be achieved on the tested piece, after the test is finished or t