The invention relates to the field of chemistry and chemical engineering, and discloses stone acid-pickling equipment. The equipment comprises a mixed acid tank, a mixed acid preheater, a graphite kettle, a circulating pump and a dilute alkali tank, wherein the mixed acid tank is connected to the circulating pump, the circulating pump is connected to the mixed acid preheater and the graphite kettle, the mixed acid preheater is connected to the graphite kettle, the graphite kettle is connected to the mixed acid tank, the mixed acid tank is connected to the dilute alkali tank, and one end of thedilute alkali tank is connected to a pipeline between the graphite kettle and the mixed acid tank through a pipeline. The invention further discloses an stone acid-pickling method. According to the stone acid-pickling equipment and method, the heated mixed acid is adopted to clean stones, and therefore the cleaning time can be shortened, in addition, the mixed acid can be recycled.