The device is a small maintenance machinery used by railway engineering divisions to tamp the railways and turnouts in maintenance and urgent repair of railways . Its gasoline engine drives the crankshaft and connecting rod through dutch which drives the piston and an impact head. The tamping pick generates a downward impact force which vibrates and compacts the track bed ballast, eliminating the twist of track and improving the safety of railway. This machine is widely acclaimed for its advanced performance, reasonable structure, convenient operation, high efficiency and good quality of tamping.