Magnetite　widely　and　stably　occurs　in　various　geological　environments.　The　mineralogical　study　of　magnetite　has　significant　implications　for　Fe　mineralization　and　ore　genesis,　and　offers　valuable　insights　for　mineral　exploration.　Due　to　the　progress　of　cutting-edge　technology　and　the　exploration　of　earth　science　at　the　nano-　to　atomic-scale,　the　study　of　magnetite　mineralogy　is　increasingly　transitioning　to　nanoscale　research　and　significant　achievements　have　been　made.　This　paper　briefly　introduces　the　crystal-chemical　characteristics　of　magnetite　and　summarizes　the　current　progress　in　its　genesis.　Among　them,　it　focused　on　nano-scale　mineralogical　research　achievements,　including　silician,　Au-Bi-bearing,　Sn-rich　and　Ti-rich　magnetite.　For　example,　the　discovery　of　Si-Fe　nanoscale　inclusions,　revisiting　the　nature　and　Si　substitution　mechanisms　in　silican　magnetite;　evidence　of　nanoscale　inclusions　as　carriers　of　trace　elements;　and　confirmation　that　Fe-Ti　oxide　exsolution　is　not　exclusive　to　magmatic　deposits.　In　addition,　features　such　as　oscillatory　zoning,　exsolution　and　dissolution-reprecipitation　which　are　widespread　in　magnetite,　indicate　the　formation　of　complex　textures　during　its　growth.　However,　microscale　studies　are　generally　insufficient　to　explain　the　causes　and　mechanisms　of　many　observed　phenomena,　whereas　nanoscale　research　can　help　clarify　their　formation　processes　and　reveal　the　micro-dynamics　of　magnetite　growth.　Thus,　the　in-depth　study　of　magnetite　nanomineralogy　will　have　a　better　understanding　on　the　ore　deposit　genesis　and　show　important　research　value　and　broad　prospects　for　future　study.