A　novel　graphene-modified　LiMnPO4　composite　as　a　performance-improved　cathode　material　for　lithium-ion　batteries　has　been　prepared　with　LiH2PO4,　Mn(CH3COO)(2)center　dot　4H(2)O,　and　graphite　oxide　(GO)　suspension　by　spray-drying　method.　X-ray　diffraction,　scanning　electron　microscopy,　transmission　electron　microscopy,　and　galvanostatic　charge-discharge　tests　are　applied　to　characterize　these　materials.　The　structure　analysis　shows　that　LiMnPO4　sheets　with　width　of　100-200　nm　and　thickness　of　20-30　nm　are　attached　to　the　graphene　sheets　in　pieces.　The　graphene　sheets　with　good　electrical　conductivity　serve　as　a　conducting　network　for　fast　electron　transfer　between　the　active　materials　and　charge　collector,　as　well　as　buffered　spaces　to　accommodate　the　volume　expansion/contraction　during　the　discharge/charge　process.　The　electrochemical　tests　show　that　the　composite　cathode　material　could　deliver　a　capacity　of　105.1　mAh/g　at　0.05　C　in　the　voltage　range　of　2.5-4.4　V.　Moreover,　the　cells　showed　fair　good　cycle　ability　over　50　cycles.