A　carbonized　La2O3　and　Lu2O3　co-doped　Mo　cathode　material　and　a　preparation　method　therefor　pertain　to　the　technical　field　of　rare　earth　refractory　metal　cathode　materials.　A　molybdenum　substrate　is　doped　with　rare　earth　active　substances　La2O3　and　Lu2O3.　The　total　added　amount　of　the　rare　earth　active　substances　is　2.0-5.0　wt%.　A　rare　earth　oxide　doped　molybdenum　powder　is　prepared　by　using　a　sol-gel　method,　　a　La2O3　and　Lu2O3　doped　Mo　powder　is　obtained　by　using　a　secondary　reduction　process,　　and　a　molybdenum　rod　is　obtained　through　compression　and　sintering.　An　un-carbonized　La2O3　and　Lu2O3　doped　Mo　cathode　is　obtained　by　processing　the　molybdenum　rod　with　rotary　calcination,　　drawing,　　cleaning,　　straightening,　　winding,　　setting,　　and　cutting　processes.　The　cathode　is　processed　with　a　high-temperature　transient　carbonization　process　to　obtain　a　carbonized　cathode　material　with　a　high　carbonization　degree.　The　cathode　is　subjected　to　high　temperature　degassing　and　activation,　　to　obtain　an　environmentally　friendly　non-radioactive　cathode　material　with　good　emission　performance　and　excellent　emission　stability.