CFx-Cu　cathode　materials　for　primary　lithium　battery　were　prepared　by　a　simple　and　novel　in-situ　chemical　modification　method　with　high-temperature　calcination　process.　The　structure,　morphology,　reaction　mechanism　and　electrochemical　performance　of　cathode　materials　were　characterized　by　X-ray　powder　diffraction,　high-resolution　transmission　electron　microscopy,　scanning　electron　microscope,　energy　dispersive　X-ray　spectroscopic,　thermo　gravimetric　analysis,　cyclic　voltammetry　and　galvanostatic　discharge.　It　can　be　inferred　that　copper　oxide　reacts　with　inert　groups　on　the　surface　of　CFx　to　produce　nano-copper　particles,　which　increases　the　electronic　conductivity　and　diffusion　performance　of　lithium-ion　in　the　CFx-Cu　cathode　materials.　Therefore,　the　composite　exhibits　excellent　specific　capacity,　rate　performance　and　power　density.　Specifically,　the　CFx-Cu　composites　shows　a　high　discharge　specific　capacity　of　546　mAh/g,　and　a　maximum　power　density　of　8393　W/kg,　with　a　discharge　voltage　platform　of　2.0　Vat　5　C.