Oil hydraulic vibration damper

The utility model relates to an oil pressure bumper and consists of a piston rod, a piston, a canister, a valve base, an extending damp valve, a compressing damp valve, an oil complementing valve and an oil absorbing valve. The damp valve is an integrated structure and is revolved on the piston or the valve base. The open pressure of the damp valve can be changed through adjusting the compressing volume of the spring and different open pressure are combined with different circulating pathways to get the damp speciality with the best damping effect. The oil pressure bumper with an arbitrary adjusted damp speciality is in particular applicable to the railway engine cars and the utility model can have a good conformability by right matching with the load.