High-pressure oil pump

The utility model provides a high-pressure oil pump and belongs to the technical field of engines. The technical problem that an existing high-pressure oil pump generates noise in the working processis solved. The high-pressure oil pump comprises a pump body with an oil inlet path, an oil outlet path and a valve cavity, an oil inlet hole for communicating the oil inlet path with the oil outlet path is further formed in the pump body, an iron core is arranged in the valve cavity, a valve rod assembly comprising a valve rod is arranged in the pump body, and the valve rod assembly can seal the oil inlet hole when the valve rod penetrates through the oil inlet hole and the valve rod moves towards the iron core. One end of the valve rod is located in the valve cavity, a concave mounting counter bore is formed in the end face, located in the valve cavity, of the valve rod, a first return spring and a buffer block are arranged in the mounting counter bore, and the two ends of the first return spring abut against the