[Ca24Al28O64](4+):4e(-)(C12A7:e(-))　is　a　new　cathode　material　with　low　working　temperature　and　low　work　function,　and　its　unique　cage　structure　attracts　attention　of　researchers.　In　this　work,　the　Sr　doped　(C(1-x)S(x))12A7:e(-)(0　＜=　x　＜=　0.05)　were　prepared　by　high　temperature　solid　phase　reaction　combined　with　spark　plasma　sintering　(SPS),　and　the　electron　compound　(Ca1-xSrx　)12A7:e(-)　was　successfully　obtained　by　reduction　of　Ti　particles　at　1100　degrees　C　for　20　h.　The　first　principle　calculations　for　electronic　structure　show　that　Sr　doping　changes　the　band　structure　of　C12A7:e(-),　the　Framework　Conduction　Band　(FCB)　decreases　to　0.3　eV,　benefits　the　electrical　properties　of　(Ca1-xSrx)12A7:e(-).　The　total　density　of　states　(DOS)　of　(Ca1-xSrx)12A7:e(-)　near　the　Fermi　energy　level　is　increased.　The　electrical　transport　characteristics　test　results　show　that　the　(Ca0.96Sr0.04)12A7:e(-)　has　the　highest　conductivity　1136　S/cm　and　carrier　concentration　(2.13　+/-　0.11)x10(21)　cm(-3),　indicating　that　Sr　doping　is　benefical　for　reducing　the　preparation　time　of　mayenite　electride.　The　thermionic　emission　performance　test　results　show　that　Sr　doping　significantly　increases　the　emission　current　density　and　effectively　reduces　the　average　effective　work　function.　The　(Ca0.96Sr0.04)12A7:e(-)　has　the　best　emission　performance,　and　the　emission　current　density　reaches　1.45　A/cm(2)　at　1100　degrees　C　and　a　anode　voltage　of　3500　V.　The　Zero　field　emission　current　density　is　0.74　A/cm(2),　and　the　Richardson　work　function　reduces　from　2.01　eV　(un-doped)　to　1.86　eV.