High -pressure pump

The utility model provides a high -pressure pump, it includes casing, plunger and fixes the fuel exit end on the casing. The casing includes plunger passageway, the studio that is connected with the plunger passageway and the first cavity for the fuel outflow that links to each other with the studio. Still be equipped with the mounting groove that encircles first cavity on the casing. The fuel exit end is fixed on the casing. The fuel exit end is including stretching into interior installation department of mounting groove and the fuel oil channel who is linked together with first cavity. High-pressure pump still is equipped with first sealing and second sealing. First sealing is just arranged in between fuel exit end and the casing for the annular. The second sealing is just arranged inbetween fuel exit end and the casing for the annular, and the more first sealing of second sealing is close to fuel oil channel, and second sealing and first sealing are for separately setting up. Theutility model discloses a