Composite　perovskite　oxides　La1-xSrxCo1-yFeyO3-delta　(LSCF)　is　an　optional　cathode　material　for　the　intermediate　temperature　solid　oxide　fuel　cells.　La0.6Sr0.4Co0.2Fe0.8O3-delta　powders　were　synthesized　by　a　citrate　method.　The　effects　of　the　precursor　solution　pH　value　and　the　calcining　temperature　on　the　phase　structure　of　the　LSCF　powders　were　investigated　by　X-ray　diffraction.　Besides,　the　impacts　of　the　precursor　solution　pH　value　and　sintering　temperature　on　the　morphology　and　impedance　characteristics　of　the　LSCF　sintered　bodies　were　studied　by　SEM,　AC　impedance　analysis,　respectively.　The　alternate-current　impedances　of　the　LSCF　sintered　bodies　were　analysized　based　on　the　Voigt-type　equivalent　circuit　model.　The　results　show　that　the　LSCF　sintered　body　has　the　lowest　impedance　in　the　condition　that　the　precursor　solution　pH　is　4,　the　calcination　temperature　is　900　degrees　C,　and　the　sintering　temperature　is　1400　degrees　C　for　2h,　respectively.