||PTesADT-BTz is the new donor-acceptor copolymer, which was synthesized through stille coupling. And PTesADT-BTz has triethylsilylethynylanthradithiophene as donor and bithiazole as acceptor. The structure and properties of synthesized polymer was characterized and identified by H-NMR and FT-IR. The measured number average molecular weight (Mn) of obtained polymer was 13000 and the weight average molecular weight (Mw) was 23000. UV−visible spectroscopy, cyclovoltammetry, thermogravimetric analysis, and differencial scanning calorimetry were used to analyze characteristics of PTesADT-BTz. The OFET employing PTesADT-BTz spin-cast from chloroform solutions at 100℃ annealing showed the mobility of 4.93 × 10-6 cm2/V·s, subthreshold slope of 29.7 V, and an on/off ratio of 2.20 × 102.