Abstract: Current research process on mercury oxidation and capture with fly ash of coal-fired power plant is summarized, including a brief introduction to the enrichment pattern of mercury in fly ash, with focus on the influence of fly ash intrinsic characteristics (such as unburned carbon content, composition and microstructure of petrography, some active inorganic components, etc.) on the mercury removal with fly ash, as well as the influence of flue gas components (conventional components, HCl, SOx, NOx and Br, etc.) on the mercury oxidation and capture. Meanwhile, a new approach is proposed for mercury removal with magnetosphere fractions present in fly ash.