The invention belongs to the technical field of helicopter design, and especially relates to a helicopter dedicated damping device. The helicopter dedicated damping device is characterized by comprising a base plate (1), an upper edge strip (2), a lateral edge (3), a lower edge strip (4), and a vertical rib (5); the base plate (1) is in a trapezoid shape, the upper edge strip (2) is arranged on the upper bottom edge of the base plate (1), the lateral edge (3) is arranged on the lateral edge of the base plate (1), the lower edge strip is arranged on the lower bottom edge of the base plate (1), and the vertical rib (5) is parallel to the upper edge strip (2) and the lower edge strip (4) and is arranged on the median line of the base plate (1). The base plate (1) is connected to the fuselage vertical web (14) through rivets; the upper edge strip (2) is connected to the fuselage vertical beam upper edge strip (9) and floor (15) through rivets; the lower edge strip (4) is connected to the fuselage vertical beam lower strip (13) through rivets; and the lateral edge (3) is connected to the edge gasket (8), frame web (10), and beam edge strip (11) through bolts and rivets. The damping device has the advantages of simple structure and lightness, and is convenient to installed, and the connection rigidity is adjustable.