The device is a Ministry of railway line maintenance of tamping small maintenance machinery, it by gasoline machine clutch drive the crankshaft and connecting rod, drives the piston and an impact head. The tamping pick have a downward impact force can make the track bed ballast vibration tamping, eliminate the sleeper triangular pits, improve the security line. This machine with advanced performance, reasonable structure, convenient operation, high work efficiency, good quality of tamping, acclaimed.