This paper reviews the current research and status of CWs for terminal effluent of WWTPs, mainly focusing on substrate selection, microbial enhancement, plant cultivation, structure optimization, electrochemical coupling, and the core still remains to strengthen the nitrogen removal efficiency of CWs・ In the future, it is necessary to build a "basic databasebased on substrate and aquatic plant options, engineering operation mon让oring, etc・ 'further reveal the biological deri让rification mechanism of terminal effluent of WWTPs, and promote the suitability and economic performance of the engineering ・ [ABSTRACT FROM AUTHOR]