Abstract: Polyethylene terephathalate (PET)-polyether ester(PEE)/antimony doped tin oxide (ATO) composites (PET-PEE/ATO) were prepared by means of threestep copolycondensation. The molecular chain structure of PETPEE/ATO was investigated using infrared spectrum and nuclear magnetic resonance. Hydrogen bond was formed between the surface hydroxyl of ATO and the β dicarboxylic acid of PEE block. As a result, ATO had a good distribution in PET-PEE/ATO matrix. Bis-(2-hydroxyethyl) terephthalate (BHET) copolycondensed with PEE and formed PET-PEE copolymer. SEM and TEM show that the sizes of ATO particles are about 50—150 nm, and ATO particles are dispersed equally in the matrix. Differential scanning calorimetry shows that, the crystallization rate, the crystallization degree and the thermal property of PET-PEE/ATO composites are improved by the inducing of PEE and ATO into PET. The specific resistance of the fiber prepared by the PET-PEE/ATO composites is about 3.4×108 Ω·cm.