Abstract: Constructed wetland coupled with microbial fuel cell (CW-MFC) is a new technology thatcombines constructed wetland technology (CW) and microbial fuel cell (MFC). It overcomes the dis⁃advantage that MFC cannot be self-contained, and can generate electric energy while treating varioustypes of wastewater. It has broad application prospect and research significance. In recent years, a largenumber of studies have been carried out on the treatment of dye wastewater, salt - containingwastewater, pesticide wastewater, organic compounds wastewater and antibiotic-containing wastewaterby CW-MFC, and important research progress has been made. However, the research content on thetreatment of heavy metal wastewater by CW-MFC is limited. Therefore, based on the existing research,the research status of CW-MFC in removing heavy metals such as chromium, arsenic, zinc, nickel andlead was summarized from the aspects of electricity production and pollutant removal effect. Theremoval mechanism of heavy metals in CW-MFC was also expounded from the aspects of matrix, elec⁃trochemistry, microorganisms and plants. According to the research status and removal mechanism, it isfound that the removal effect and electricity generation performance of CW-MFC on wastewater contai⁃ning high-valence heavy metals (such as Cr (VI)) are better. The improved performance should beattributed to the strong oxidation property of high-valence heavy metals, which increases the redox gra⁃dient of CW-MFC, promotes the electricity generation of the system and improves the efficiency ofelectrochemical removal. Finally, the challenges and prospects of CW-MFC technology are discussed inorder to provide a theoretical basis for its development.