A　new　kind　of　materials　La2O3-Gd2O3-Mo　was　produced　by　powder　metallurgy　method.　The　composition　and　microstructure　of　the　material　were　studied　by　XRD　and　SEM.　It　shows　that　no　chemical　reaction　takes　place　among　La2O3,　Gd2O3,　Mo　and　the　rare　earth　oxides　exist　along　molybdenum　grain　boundaries　and　in　the　pores.　The　emission　property　measurement　results　of　this　material　show　that　adding　rare　earth　oxide　into　molybdenum　can　improve　the　secondary　emission　coefficient　of　the　emitter,　and　the　emission　property　depends　on　the　activating　temperature.　After　activating　of　La2O3-Gd2O3-Mo　at　1360°C,　the　maximum　secondary　emission　coefficient　can　reach　to　2.62,　which　has　exceeded　that　for　practical　uses(2.0).