The piston liquid filling machines are suitable for vegetable oil chemical, daily chemical, liquid and other types of viscous, non-viscous, corrosive liquid quantitative small package filling and linear filling. On one hand, the machine is equipped with filling volume adjusting handle, filling speed is fast and filling precision can be guaranteed. On the other hand, the filling head adopts anti-dripping and anti-stretching lifting and filling device, and the hopper is equipped with adjustable-speed stirring device to make the material filling more uniform. The machine has a unique design, very superior performance, as well as the appearance of the international concept of machinery and equipment and other good advantages.