The utility model discloses a phosphoric acid pickling passivation equipment, including cauldron formula casing, the polycrystalline substance, supporting legs, the mixer, the stirring leaf, place the board, the lid, the hinge, a raw material chamber, the 2nd raw material chamber and flow control valve, the bottom of cauldron formula casing is equipped with the polycrystalline substance, the polycrystalline substance is the arc structure, the basal surface of polycrystalline substance is equipped with the landing leg, the fixed mixer in bottom of polycrystalline substance, and the main shaft of mixer runs through the polycrystalline substance, and extend to the inside of cauldron formula casing, and connect the stirring leaf, the inside of cauldron formula casing is equipped with in the top that lies in the stirring leaf places the board, the hinged joint lid is passed through at the top of cauldron formula casing, the upper surface of lid is equipped with a raw material chamber and the 2nd raw material chamber, and a raw material chamber and the 2nd raw material chamber are respectively and be equipped with the through -hole between the cauldron formula casing, the inside of through -hole respectively is equipped with flow control valve. The utility model discloses, simple structure, degree of automation is high, can accurately carry out the ratio with phosphoric acid and water to carry out effectual mixture with both.