The utility model provides a liquid dosing machine. The liquid dosing machine comprises a machine frame, a driving mechanism, a cache bottle, a raw material bottle, a pipeline and a plurality of valves, wherein a discharging terminal is arranged at one end port of the pipeline, the raw material bottle and the discharging terminal are connected through the pipeline to form a main pipeline, the valves are arranged at the outlet of the raw material bottle and the discharging terminal, the driving mechanism and the cache bottle are connected to form a first branch and connected to the main pipeline through the valve, and a temporary storage bottle is arranged at the near end of the discharging terminal, forms a second branch and is connected with the main pipeline through the valve. Liquid in the raw material bottle at the far end is temporarily stored in the temporary storage bottle through the driving mechanism and the cache bottle, and liquid temporarily stored in the temporary storage bottle at the near end is rapidly and accurately conveyed to the discharging terminal through the driving mechanism and the cache bottle and then enters a boiler, so that the technical problems in the long-distance conveying process of an existing liquid dosing machine are resolved.