The utility model discloses a limestone slurry tank, including the box, set up feed inlet and inlet tube on the box, set up the agitating unit in the box, agitating unit includes the connecting axle and sets up in connecting epaxial stirring rake, is provided with the motor on the connecting axle, having offered the bayonet socket on the stirring rake, being provided with supplementary stirring in the bayonet socket, supplementary stirring is including setting up pivot in the bayonet socket, the fixed setting in changeing epaxial clean, the inner wall butt of clean piece and box, being provided with in the pivot and rotating the piece, the pivot is rotated with the inner wall friction of box through the rotation piece, and clean along with pivot rotation and rotation. The utility model has the advantages of limestone slurry in the abundant dispersion agitator tank.