The invention discloses an impregnating compound preparing system for producing continuous basalt fibers and relates to the field of inorganic nonmetallic material processing. The impregnating compound preparing system sequentially comprises a feeding system, a reaction tank, a mixing tank and a distribution pipe from top to bottom, wherein the feeding system comprises feeding tanks, stirring devices I, heating sleeves I, liquid level sensors I, water inlet pipes I and discharge pipes I, part of the discharge pipes I converges at the feed inlet of the reaction tank, and the rest of the discharge pipes I and a discharge pipe II converge at the feed inlet of the mixing tank; the reaction tank is provided with a stirring device II, a blowing ring, a liquid level sensor II, a heating sleeve II, a water inlet pipe II and the discharge pipe II; the mixing tank is provided with a stirring device III, a liquid level sensor III, a heating sleeve III and a discharge pipe III, and liquid level sensors and valves are connected with a PLC. The impregnating compound preparing system has the advantages that optimal dissolving and reaction temperature is provided for an impregnating compound, the impregnating compound is directly conveyed into a draw bench, automatic preparation is achieved, and the production efficiency and quality of the basalt fibers are increased.