The invention relates to a continuous liquid preparation device for a high flow concentrated liquid and a control system thereof, belonging to the field of liquid preparation processes. The invention solves the problems of poor liquid preparation quality and low liquid preparation speed of the traditional liquid preparation control method and poor mobility of liquid preparation equipment. The continuous liquid preparation device comprises a concentrated liquid chamber, a tackifying chamber, an assistant chamber and n finished product tanks, wherein the concentrated liquid chamber receives kerosene, the concentrated liquid chamber outputs a concentrated liquid to the tackifying chamber, the tackifying chamber receives clean water supplied by a water supply source, the tackifying chamber simultaneously receives various assistants supplied by the assistant chamber, and the tackifying chamber outputs prepared liquids to the finished product tanks; the assistant chamber comprises m assistant supply units, and each assistant supply unit comprises an assistant barrel, a liquid adding pump, a liquid storage tank, an addition pump, an assistant flow meter and an assistant addition valve; the concentrated liquid chamber comprises a powder tank, a concentration tank and a stored liquid metering tank; and the tackifying chamber comprises a water supply pump, a water supply valve, a water flow meter, a resistance-reducing agent box, a mixing device and a stirring box, and the liquid preparation output port of the stirring box is connected with an inlet of each finished product tank through pipelines.