A kind of p- type segmented Bi2 Te3/ CoSb3 thermoelectric material was prepared by spark plasma sintering( SPS ). When the segmented materials were used at the temperature ranging from 300 K to 800 K, the junction temperature was optimized, which is about 500 K, and the corresponding length ratio of CoSb3 to Bi2 Te3 is about 15:2. The measured maximum power output of segmented materials is about 320 W·m-2, which is about 1.8 times as high as that of monolithic material CoSb3 under the same measuring conditions.