The invention relates to the technical field of filling machines, in particular to a linear servo filling machine. The linear servo filling machine comprises a machine frame. A pump frame is fixed to the machine frame. The pump frame is provided with a metering pump. A check valve is connected to the metering pump. The metering pump is connected with a filling component. The lower end of the metering pump is connected with a linear reciprocating movement mechanism through a guide transmission shaft. By the adoption of the structure, the linear servo filling machine executes filling metering through the plunger type metering pump, mechanical-electrical-pneumatic integration is achieved, servo drive is adopted, and the occupied area is small. The linear servo filling machine is widely applied to the pharmacy industry, the food industry, the pesticide industry, the chemical industry, the cosmetic industry and the like and completely meets the requirements of GMP.