The invention discloses a slurrying system for limestone slurry. A discharging port of a limestone discharging hopper is connected with a feeding end of a vibration feeder. A discharging end of the vibration feeder is connected with a feeding port of a bucket elevator. A discharging port of the bucket elevator is connected with a feeding port of a limestone storage bin. A feeding port of a belt weighing feeder is connected with a discharging port of the limestone storage bin. A discharging port of the belt weighing feeder is connected with a feeding port of a wet-type ball mill. A discharging port of the wet-type ball mill is connected with the top of a mill slurry circulating box. The bottom of the mill slurry circulating box is connected with a feeding port of a limestone cyclone. An overflow port of the limestone cyclone is connected with the top of a limestone slurry box. A bottom flow port of the limestone cyclone is connected with a feeding port of the wet-type ball mill. The slurrying system for limestone slurry has the beneficial effects that equipment is simplified, and equipment cost and project cost are reduced; limestone larger than 20 mm is prevented from entering the equipment; metal materials are prevented from entering the equipment; and the situation that excessive insoluble impurities return into an absorption tower is avoided, the quality of gypsum is improved, and the pipeline blockage probability is reduced.