High pressure common rail pump high reliability and long life one-way check valve

The utility model discloses a high pressure common rail pump high reliability and long life one-way check valve, which comprises an oil outlet hole, a spring seat, a return spring and a sealing ball, wherein a sliding guide sleeve is added between the return spring and the sealing ball, a ball holding surface is arranged on the right end surface of the sliding guide sleeve, a return oil hole which is arranged on the bottom portion of the ball holding surface is communicated with the a spring limit hole, a side oil inlet channel is arranged on a conical surface of a cone segment, and is communicated with the spring limit hole, the sealing ball, the sliding guide sleeve, the return spring and the spring seat are orderly arranged in the oil outlet hole, the sealing ball is sealed and contacted with a sealing conical surface by being centered and hold by the ball holding surface under the action of the return spring, and an opening-closing distance of the high pressure common rail pump high reliability and long life one-way check valve is arranged between the sliding guide sleeve and the spring seat in the axial direction. The sealing ball is centered and hold through the ball holding surface during the moving process, is guided and also can not be damaged, and forms a steady and reliable sealing belt with the sealing conical surface, thereby being capable of putting an end to enable high pressure oil from flowing back, and improving common rail high pressure oil supply performance and prolonging service life.