Artificial wetlands are man-made systems that use for a solution of water pollution. Constructed wetlands provide the benefit of being an effective treatment method at a reasonable cost. Numerous industrial and agricultural processes discharged the pollutants especially heavy metals into the environment. These pollutants caused harmful effect to living being. The various engineered methods are used for metal remediation. But metal remediation through engineered wetlands are adsorption, precipitation, absorption, and deposition is the best way for water purification. The CWs that are used to extract metal ions from wastewater are covered in this chapter. The removal of heavy metals in CWs occurs through a combination of physical, chemical, and biological processes. Sedimentation plays a key role in removing particulate-bound metals. A detailed explanation is provided of the variables influencing the removal processes and the effectiveness of the techniques. Despite the clear advantages of CWs for metal removal, several analytical challenges must be addressed to fully optimize and evaluate their performance. In addition to their wastewater treatment function, CWs can contribute to the conservation of water resources by allowing treated water to be reused for irrigation or other non-potable applications.