The invention relates to an intensive large-scale ionic rare earth ore leaching mother liquor continuous processing system and method. The system includes an ammonium bicarbonate supply module, a flocculant supply module, a multi-stage series-connected impurity removal / precipitation stirring module, and an impurity removal / product thickener. , leaching agent preparation module, etc. Automatic operation, automatic adjustment and control of process parameters, and more accurate control; good impurity removal effect, better and more stable product quality, saving reagents and reducing production costs; highly intensive equipment and facilities, and a water metallurgy workshop with the same production capacity covers an area Compared with the existing technology, it is greatly reduced; large-scale production is realized, and the hydrometallurgical workshop with the same floor area, with highly integrated equipment and facilities, can obtain mother liquor processing capacity and product output production capacity far greater than the existing technology. Connect the in-situ leaching mine with the mother liquor treatment workshop, rationally plan the mining area, realize the orderly mining of the mine, rationally utilize the process solution, and regulate the water balance, which is conducive to the environmental protection management of the mine and realizes a green mine.