A damping device applicable to a hinge comprising a first component, a second component pivoted to the first component, and a mounting member, the damping device comprising: a housing configured to be installed on one of the first component and the second component; a damper arranged on the housing, the damper comprising a first movable member and a second movable member longitudinally movable relative to each other; an abutting member configured to abut against the second movable member of the damper; and an adjusting member transversely movable relative to the housing, wherein the housing comprises an extension part, and the adjusting member is movably installed on the extension part, characterised in that the adjusting member comprises a main body and a flexible part connected to the main body, wherein the main body has a transverse guiding feature for allowing the adjusting member to be transversely movable relative to the housing, wherein the transverse guiding feature comprises a first hole, a second hole, and at least one guiding section located between the first hole and the second hole, the adjusting member is connected to the extension part of the housing by the mounting member passing through one of the first hole and the second hole; wherein when the mounting member passes through the first hole of the adjusting member to hold the adjusting member at a first position relative to the housing, the adjusting member abuts against the first movable member of the damper; wherein when the mounting member passes through the second hole of the adjusting member to hold the adjusting member at a second position relative to the housing, the adjusting member does not abut against the first movable member of the damper. a housing configured to be installed on one of the first component and the second component; a damper arranged on the housing, the damper comprising a first movable member and a second movable member longitudinally movable relative to each other; an abutting member configured to abut against the second movable member of the damper; and an adjusting member transversely movable relative to the housing, wherein the housing comprises an extension part, and the adjusting member is movably installed on the extension part, characterised in that the adjusting member comprises a main body and a flexible part connected to the main body, wherein the main body has a transverse guiding feature for allowing the adjusting member to be transversely movable relative to the housing, wherein the transverse guiding feature comprises a first hole, a second hole, and at least one guiding section located between the first hole and the second hole, the adjusting member is connected to the extension part of the housing by the mounting member passing through one of the first hole and the second hole; wherein when the mounting member passes through the first hole of the adjusting member to hold the adjusting member at a first position relative to the housing, the adjusting member abuts against the first movable member of the damper; wherein when the mounting member passes through the second hole of the adjusting member to hold the adjusting member at a second position relative to the housing, the adjusting member does not abut against the first movable member of the damper.