Large-flow high-pressure fluid test system

The utility model relates to a large-flow high-pressure fluid test system. The system comprises a test loop. The test loop comprises a water pump, a test piece and a pipeline connecting the water pump and the test piece. The inlet and the outlet of the test piece are connected with a differential pressure meter, the test loop is provided with a constant temperature device, and the test loop is externally connected with a supercharging and pressure stabilization device. According to the utility model, the test loop is provided with the differential pressure meter to detect the pressure drop of the test piece, and the supercharging and pressure stabilization device, on one hand, provides pressure for the loop so as to make up for the defects of large flow and small pressure of the water pump, and on the other hand, works with the constant temperature device in a coordinated mode so as to stabilize the pressure and the temperature of the test loop and ensure the stability of the whole test system and the repeatability of tests. The large-flow high-pressure fluid test system can be applied to the tests of parts in a thermonuclear field.