The invention discloses a high-pressure valve which comprises a valve body, a valve cover, an air inlet passage arranged on the valve cover, a first chamber arranged in the valve body, an elastic piece capable of dividing the first chamber into a second chamber and a third chamber, an air outlet passage communicating the outside and the third chamber, a fourth chamber and a fifth chamber arranged in the valve body and communicating with each other, a piston arranged on the lower surface of the elastic piece in a clamping manner, a press cake positioned below the piston, and a sixth chamber capable of moving the piston and the press cake, wherein the fourth chamber communicates with a high-pressure air inlet; the fifth chamber communicates with a high-pressure air outlet; the press cake is used for blocking the communicating state of the fourth chamber and the fifth chamber after moving downwards. According to the high-pressure valve, an elastic membrance is arranged on the piston, so that the response speed of the high-pressure valve is increased, the using stability of the high-pressure valve is enhanced, the size of the high-pressure valve is reduced, and the abrasion replacement frequency of the high-pressure valve is decreased.