This oil pump is designed for heavy-duty construction and mining excavator operation scenarios, manufactured in strict accordance with standardized specifications to deliver consistent structural durability and long service life. It fits precisely with the corresponding excavator engine assembly, maintaining stable oil pressure during continuous high-load operation, delivering excellent heat resistance to adapt to harsh working environments with temperature fluctuations, and providing reliable physical interception of large particulate debris in the oil circuit to maintain flow integrity of lubrication system, reducing wear of core engine components. It goes through multi-dimensional dimensional inspection before leaving the factory, which can effectively shorten the replacement and commissioning cycle, and support the stable operation of excavators in earthwork excavation, mining stripping and other construction scenes.