The utility model discloses a magnetic impurity separating device which comprises a batch feeder and is characterized in that a magnetic filter is arranged at the feed opening of the batch feeder. In the utility model, the magnetic filter, which is arranged at the feed opening of the batch feeder to conduct magnetic impurity separation on materials entering the batch feeder, can effectively remove the magnetic impurities in the materials and greatly reduce the magnetic impurity contents in products at length, so as to ensure the quality of the products and meet the requirements of customers.