The powders of p-type pseudo-ternary Sb2Te3-Bi2Te3-Sb2Se3 thermoelectric materials prepared by mechanical alloying method were analysed by XRD, with Te，Bi，Sb and Se element granules alloyed after 100h ball milling. The alloyed powders were analysed by SEM, showing granules of fine powders about 10—100nm in size. Blocks of p-type pseudo-ternary thermoelectric materials were prepared with the powders by cold-pressing and sintering. Seebeck coefficient and electrical conductivity for samples with different sintering temperatures were measured at room temperature. The results suggest that thermoelectric properties gradually improve with sintering temperatures during 300℃, the power factor enhances from 0.59μW cm-1K-2 of unsintered samples to 15.9μW cm-1K-2 of samples sintered at 300℃. So the result might play an important role in optimizing sintering temperature.