Abstract: 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 Ca₂Co₂O₅ compound were investigated. The results show that the Ca₂Co₂O₅ compound can be obtained by using the powders calcined at 850oC for 8h after spark plasma sintering at 850oC and 30 MPa for 5min. 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 800oC.