The invention discloses a high-pressure silencer suitable for performing noise elimination and noise lowering on discharged high-pressure gas. The high-pressure silencer comprises a shell, noise eliminating bodies and a silencing material; one end of the shell is a cylinder of a spherical end socket which is provided with a gas inlet connection nozzle; the other end of the shell is closed through a hole plate with exhausting holes; the portion, close to one end of the spherical end socket, in the shell is provided with the noise eliminating bodies with the noise eliminating level number being N; one end of the first level of noise eliminating body is connected with the gas inlet connection nozzle; the noise eliminating bodies of all the levels are each provided with a vent hole, are each in a round pipe shape and are arranged in a concentric sleeved manner; and the portions between the inner wall of the shell and the outer sides of the noise eliminating bodies are filled with the silencing material, wherein N is larger than or equal to 4 and is a natural number. High-pressure gas flow enters the noise eliminating bodies from the gas inlet connection nozzle, the volume is gradually increased, the density is continuously decreased, noise is gradually weakened, the weakened gas flow enters the silencing material and is further weakened, and when the gas flow reaches the hole plate, the noise is finally weakened substantially. The high-pressure silencer is good in silencing effect, simple in structure, high in strength, convenient to install and easy to maintain.