Ca2Co2O5　compound　was　prepared　by　coprecipitation　method　and　spark　plasma　sintering　(SPS).　Co(NO3)2　·　4H2O　and　Ca(NO3)2　·　6H2O　were　used　as　raw　materials　and　Na2CO3　was　used　as　precipitation　agent.　The　pyrolytic　decomposition　mechanism　of　the　precursor,　phase　and　the　morphology　of　the　sample　were　investigated　by　TG-DTA,　XRD　and　SEM.　The　thermoelectric　properties　of　Ca2Co2O　compound　were　investigated.　The　results　show　that　the　Ca2Co2O5　compound　can　be　obtained　by　using　the　powders　calcined　at　850°C　for　8　h　after　spark　plasma　sintering　at　850°C　and　30　MPa　for　5　min.　The　electric　resistivity　and　thermal　conductivity　decrease　with　temperature　increasing　within　the　measured　temperature　range.　The　ZT　value　is　estimated　to　be　0.12　at　800°C.