The utility model relates to a mechanical engineering equips and uses damping device, its characterized in that: including dampening ring, dampening ring is last to be equipped with several shock attenuation plunger jar along axial direction, seal installation has the shock attenuation plunger in shock attenuation plunger jar, the sealing cylinder lid is installed through fixing bolt in dampening ring's outside shock attenuation plunger jar position, there are high -pressure nitrogen gas and hydraulic pressure fluid at shock attenuation plunger jar title page, sealing cylinder covers and installs the inflation valve, the shock structure is equipped with seal groove and direction annular beyond the great wall, install the sealing washer in the seal groove, the guide ring is installed to the guide ring inslot. Adopt above -mentioned technical scheme, compare with prior art, the utility model discloses the damping device shock attenuation of developing is effectual, and the structure is simple relatively, and the installation is maintained conveniently, and the practicality is reliably spent higherly, and spare part interchangeability is high, and used repeatedly and change are convenient, and damping device long service life has good use value and economic benefits.