Damping device of railway switch machine with support base

The utility model relates to a damping device of a railway switch machine, which is provided with a supporting base and is suitable for being used on switch machines of switches on railway high-speed or heavy-load routes. The damping device comprises a damping box which is connected with a supporting plate of the switch machine; a mounting plate is arranged under the damping box and is fixed on the base through bolts; the base is an oblong plate directly arranged on a ballast or hardened foundation, is 300 mm to 2800 mm in length, is 50 mm to 1500 mm in width, and is 10 mm to 1000 mm in height; and the mounting plate is a concrete part or a steel structure part with mounting screw holes or through holes. On the premise of unchanging the supporting structure of the switch machine, the utility model changes the supporting mode of the supporting plate of the switch machine, improves the stress state of the supporting plate of the switch machine, greatly decreases the vibration amplitude of the switch machine whe