Abstract: Two new benzothiadiazole type conjugated copolymers concieving rigid and flexble chain were obtained by polycondensation of 3,3′dimethylbenzidine or pphenylenediamine with 4,7dibromo2,1,3benzothiadiazole Grignard reagents using nickel(Ⅱ) complex as catalyst. The copolymers were characterized by FTIR、1HNMR、UVVis、XRD and TGA. UVVis spectra of the obtained copolymers show that absorption λmax is about 306、380 nm, and the photoluminescence emission peak is about 493、562 nm, respectively. The copolymers show good heat stability and crystallization.