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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 , ultra-violet 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.