Abstract: During the existing comprehensive utilization methods of ferruginous manganese ore, it's found that the spinel-type composite ferrites with strong magnetism are readily generated from the Mnand Fe constitutes resulting in the poor separation of the valuable metals. In this study, thetraditionalseparationof Mnand Feischanged, andtheextraction of valuable components and preparation of manganese ferrites synchronously from the ferruginous manganeseore by mineral phase reconstructionis put forward. The principle of mineral phase reconstruction, the particle size characterization of new phase, the mechanism of mineral phase reconstruction and grinding and separation, and the performance of separated magnetic products are reviewed in this work. This study is a typical case research of mineral-metallurgy-materials integration research, which can provide a short process for the high-efficiency utilizationof metallic mineral resources, and it also provides a technical reference for the comprehensive utilization of other types of low-grade polymetallic ore resources.