Iron　fluoride　(FeF　3　and　FeF　2　)　is　a　potential　candidate　for　the　next　generation　of　lithium-ion　battery　(LIBs)　cathode　materials　due　to　their　high　theoretical　specific　capacity　and　low　cost.　However,　previous　studies　have　reported　that　the　poor　conductivity　of　FeF　3　and　FeF　2　prevents　their　theoretical　specific　capacity　from　being　effectively　realized.　Herein,　fluorinated　graphene　loaded　FeF　x　(FeF　x　@FG)　submicron　sphere　was　synthesized　using　graphene　oxide　and　utilized　as　cathode　materials　for　LIBs.　Characterization　by　X-ray　diffraction　and　transmission　electron　microscopy　confirmed　that　the　synthesized　FeF　x　(x　=　2　and　3)　contains　mixed　FeF　3　and　FeF　2　crystals.　The　mixed　crystal　structure　enables　the　FeF　x　@FG　submicron　sphere　composite　to　display　two　steps　in　the　electrochemical　reaction　when　FeF　3　and　FeF　2　discharge　cooperatively,　leading　to　excellent　discharge　performance.　In　addition,　since　the　FG　prepared　by　acid　thermal　method　has　good　conductivity,　it　can　significantly　improve　the　FeF　x　conductivity　and　specific　capacity　when　being　connected　to　FG　via　C　-F　bond.　The　electrochemical　tests　show　that　the　initial　discharge　capacity　of　FeF　x　@FG　is　as　high　as　394.24　mAh/g　at　the　rate　of　0.2C　in　the　range　of　1.5　-　4.0　V　at　25　degrees　C　and　display　an　excellent　discharge　capacity　retention　rate　after　the　first　discharge　process,　showing　great　potential　of　the　mixed　crystalline　iron　fluoride　cathode　in　the　field　of　lithium-ion　batteries.