The invention relates to a high pressure damper. The high pressure damper comprises a rotating shaft and a sleeve, and is characterized in that the rotating shaft consists of three sections, i.e. a screw which is protruded out of the central hole of the sleeve, a main shaft and a shaft shoulder, which are inserted into the sleeve, and a key handle which is exposed out of the sleeve; two symmetric stop walls are arranged on the outer surface of the main shaft, each stop wall is respectively provided with a groove, one edge of the groove is a pressure bearing plate, the other edge of the groove is a leakage plate with a notch, the pressure bearing plate is connected with the leakage plate on one end of a connecting screw of the main shaft through a fan-shaped connecting plate, and the outer circular surface of the fan-shaped connecting plate is matched with the inner diameter of the sleeve; a valve blade with a hole is inserted into the groove on each stop wall, and the valve hole is opposite to the notch on the leakage plate; two symmetric straight bars are arranged on the inner wall of the sleeve, the inner cavity of the sleeve is divided by the straight bars into two sealing cavities which are identical in capacity, and each sealing cavity is fully filled with damping oil; the rotating shaft is inserted into the sleeve, a nut is screwed onto the screw, and the nut and a compression washer squeeze a second sealing ring. By adopting the high pressure damper, the pressure resistance and application stability of the high damper can be greatly improved, and the service life is greatly prolonged.