Ferrosilicon　powder　surface　coated　with　a　dense　epoxy　resin　membrane　was　prepared　via　coating　precipitation　methods　using　silane　coupling　agents　as　the　modifier　and　epoxy　resin　as　the　coating　agent.　FTIR,　FESEM,　MPMS-XL,　and　TG-DSC　were　used　to　analyze　the　morphology,　surface　composition,　magnetic　property　and　thermostability　of　ferrosilicon　powder　before　and　after　the　modification　and　coating.　The　experimental　results　indicate　that　epoxy　resin　membranes　of　a　certain　thickness　were　successfully　coated　onto　the　surface　of　ferrosilicon　powder;　coatings　of　epoxy　resin　contributed　to　the　decreased　the　rate　of　weight　loss　via　the　reduced　wear　of　the　coatings　and　provided　resistance　to　corrosion;　the　apparent　viscosity　of　medium　suspension　with　coated　ferrosilicon　was　smaller　than　that　of　magnetite.　Meanwhile,　analysis　reveals　that　room-temperature　magnetic　hysteresis　loops　of　ferrosilicon　powder　remain　basically　unchanged　before　and　after　coating.