The central phenyl and biphenyl groups were introduced into the N-positions of two thiophene-carbazole structures to form the desired 9,9'-(1,4-phenylene)bis[3,6-di-2-thienyl]-9H-carbazole(BTCPh) and 9,9'-[1,1'-biphenyl]-4,4'-diylbis[3,6-di-2-thienyl]-9H-carbazole(BTCBPh), respectively. The obtained BTCPh and BTCBPh were electrochemically polymerized to generate the corresponding polymers, poly 9,9'-(1,4-phenylene)bis[3,6-di-2-thienyl]-9H-carbazole(pBTCPh) and poly 9,9'-[1,1'-biphenyl]-4,4'-diylbis[3,6-di-2-thienyl]-9H-carbazole(pBTCBPh), which might possess the cross-linked structure. The polymers were investigated by different character methods, such as cyclic voltammetry, multi-current step, ultraviolet visible near infrared absorption spectrum, scanning electron microscope and so on. The results showed that both of pBTCPh and pBTCBPh polymers exhibited excellent electrochromic properties with similar color changes, high optical contrast and good electrochemical cycle stability. And pBTCPh polymer film showed the faster color switching speed than pBTCBPh, which was ascribed to the possible more uniform stack structure in pBTCPh film. The uniform stack structure was beneficial to the fast ion inserting/deserting behavior in the electrochromic process.