The invention provides a damping device. The damping device comprises a front connector, a rear connector, a sliding pry bar and a damper, one end of the sliding pry bar is connected with a machine body structure, and the other end of the sliding pry bar is connected with the damper; an inclined supporting rod is arranged between the front connector and the rear connector, so that triangular structures are correspondingly formed between the sliding pry bar and the inclined supporting rod and among the inclined supporting rod, the machine body structure and the damper; the damper is provided with an upper connector, an inner cylinder, an outer cylinder, plugs, a piston, a piston rod, a fixed plate and a lower connector, the upper connector is connected with the machine body structure, and the lower connector is connected with the sliding pry bar through the rear connector; the inner cylinder and the outer cylinder are in butt joint through the plugs, an inner cavity I is formed in the inner cylinder, and red oil is injected into the inner cavity I; the piston divides the interior of the damper into the inner cavity I and an inner cavity II, one end of the piston rod is connected with the piston, the other end of the piston rod is connected with the fixed plate, and the inner cavity II is formed between the piston rod and the fixed plate. The damping device is simple in structure, convenient to use, capable of being applied to vertical landing damping of a small-load aircraft and also capable of being used for sliding landing damping of the small-load aircraft.