Abstract:Acid Mine Drainage (AMD) is characterized by high concentration of heavy metals, sulfate, Fe ions and highly acidic conditions, and the harm it causes to the environment should not be ignored. Traditional physical, chemical and biological methods of AMD management have been widely studied and applied, and they have all been proven effective. However, individual treatment methods have problems such as low efficiency or secondary pollution when applied. Among biological approaches, both bacterial and algal applications have been identified as effective treatment for AMD, however there are relatively few studies on the use of biochar in conjunction with bacteria and algae. This study firstly outlines the causes and hazards of AMD, and finally reviews the effectiveness of combining biochar with bacteria and algae to treatment AMD, respectively. Most studies have shown that the well-developed pore structure and better adsorption capacity of biochar provide a good basis for combined microbial applications. At present, in the domestic and international studies on the management of AMD, no studies have been found on the treatment of AMD by combining biochar-bacteria-algae. Therefore, based on the excellent performance of biochar, bacteria, and algae in treating AMD individually, the potential synergistic effect among the three of them deserves in-depth investigation.