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In this research, three highly efficient combination systems, including constructed wetland microbial fuel cell (CWMFC), hydrolytic sludge acidification coupling with constructed wetland microbial fuel cell (HSA-CWMFC) and hydrolytic filler acidification coupling with constructed wetland microbial fuel cell (HFA-CWMFC), were applied to the removal of pollutants from domestic sewage. The three combination systems could effectively treat domestic sewage and generate clean energy. The power generated by CWMFC, HSA-CWMFC, and HFA-CWMFC was 0.36 W/m2, 0.40 W/m2, and 0.43 W/m2, respectively. The results indicated that the removal rates of chemical oxygen demand (COD), total organic carbon (TOC), total phosphorus (TP), ammonia nitrogen (NH 3 –N), and nitrate nitrogen (NO 3 −-N) in HFA-CWMFC could achieve the optimal values of 91.01%, 90.63%, 95.35%, 86.11%, and 91.01%, respectively. In addition, HFA-CWMFC produced more organic acids than HSA-CWMFC, which was beneficial to the follow-up reaction. Through qualcomm sequencing analysis, it could be seen that Firmicutes , which could enhance power generation capacity and increase removal rates of pollutants, played an important role in HFA-CWMFC. The results demonstrated that the three combined systems had excellent application prospects for sewage treatment and energy generation. [Display omitted] ● The hydrolytic combination systems had remarkable effect on pollutants removal. ● The hydrolytic filler combination system could obviously remove pollutants. ● Microbial community in the hydrolytic filler combination system was more abundant. [ABSTRACT FROM AUTHOR]