In　this　paper,　a　new　fabrication　method　of　barium-calcium　aluminate　impregnated　cathodes　is　reported　Barium-calcium　aluminates　were　fabricated　by　one-pot　hydrothermal　reaction.　The　sintering　temperature　of　the　material　is　lower　than　the　conventional　method　about　100　degrees　C　and　the　impregnation　temperature　is　decreased　about　50　degrees　C.　The　pulsed　emission　current　density　of　this　cathode　could　reach　12.64A/cm(2)　at　1100　degrees　C-b　which　was　equal　with　the　conventional　impregnated　Ba-W　cathode.