Civil engineering damping device

The utility model relates to the technical field of civil engineering, in particular to a civil engineering damping device which comprises a damping box, a damping cavity is formed in the damping box, sliding grooves are formed in the left side and the right side of the bottom end of the damping cavity, sliding rods are fixedly connected to the interiors of the sliding grooves, and sliding blocks are slidably connected to the circumferential outer walls of the sliding rods. Shock absorption rods are slidably connected to the left side and the right side of the top end of the shock absorption cavity through sliding through holes, supporting plates are fixedly connected to the top ends of the shock absorption rods, and the bottom ends of the shock absorption rods make contact with the top ends of the shock absorption blocks; and the circumferential outer wall of the damping rod is sleeved with a damping spring, so that the problem that the stability of the supporting plate and a building on the supporting plate