This modular engine pump valve durability test bench features a container-type structure and a modular design, making it convenient for transportation and outdoor operation. The key excavator components, including the engine, main pump, main valve and radiator are all integrated inside the equipment, which makes use of a throttling load mode. The device can intelligently simulate various single- and compound-action conditions of excavators, and is able to satisfy all requirements for durability testing of engine pump valves in 25- to 60-ton excavators.