Continuous automatic quantitative liquid supply device

The utility model discloses a continuous automatic quantitative liquid supply device which comprises a mixed liquid storage tank (1), a liquid supply device and a control cabinet (13) for controlling the liquid supply device, wherein the liquid supply device comprises at least one pump (2), a liquid inlet pipe of the pump (2) is connected with the mixed liquid storage tank (1), the displacement of the pump (2) is in direct proportion to the rotating speed of the pump, and the rotating speed of the pump (2) is adjusted by adopting a frequency converter. According to the continuous automatic quantitative liquid supply device, the rotating speed of the pump can be accurately changed by frequency control of speed, so that the liquid supply can be accurately controlled to meet the requirement of liquid doped into additional moving materials according to the set ratio or flow and realize the accurate doping and/or reaction of the materials according to the set ratio, the rotating speed of the water pump can be pres