The invention provides an automobile engine high-pressure oil pump. The automobile engine high-pressure oil pump is simple and compact in structure. The weight, the cost and the technology complexitydegree of the high-pressure oil pump are reduced, and the arrangement space is optimized. The automobile engine high-pressure oil pump comprises an oil pump body. An oil inlet, a working oil cavity, avalve cavity and an oil outlet which sequentially communicate with one another are formed in the oil pump body, an oil pump plunger is movably arranged in the working oil cavity, and a safety valve spring, a safety valve plate, a retainer ring, an outlet valve plate and an outlet valve spring are sequentially arranged in the valve cavity in the direction from the working oil cavity to the oil outlet; an oil supply through hole is formed in the center of the retainer ring, an oil drainage through hole is formed by the side of the oil supply through hole, and the retainer ring is fixedly connected with the valve cavity; and a communicating structure is arranged on the position, corresponding to the oil drainage through hole, of the outlet valve plate, so that the two sides of the outlet valve plate communicate with each other through the communicating structure, a through hole is formed in the center of the safety valve plate, and the oil drainage through hole can be closed when the safety valve plate is tightly attached to the retainer ring. According to the automobile engine high-pressure oil pump, a plurality of parts are omitted, a bypass oil passage does not need to be arranged, the structure is simplified and the difficulty of the production technology is reduced, and the cost is reduced.