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The increase of solid wastes exerted great pressure on the environment and even damaged human health. Given this, the resource utilization of solid wastes became an inevitable trend of the industrial development. However, many researchers recognized that solid wastes with the component of Fe 2 O 3 , SiO 2 , Al 2 O 3 , TiO 2 , etc., could be utilized as the low-cost materials for preparing NH 3 -SCR catalysts, which could solve both the accumulation of solid wastes and the emission of NO x in industrial processes. Herein, some typical solid wastes, such as blast furnace slag (BFS), red mud (RM), coal fly ash (CFA), Fenton sludge (FS), etc., were extensively studied for their potential in NH 3 -SCR catalysts. Although the presence of some harmful components in solid wastes led to catalysts deactivation, they could still be excellent supports applied on NH 3 -SCR catalysts after proper pretreatment. In fact, these catalyst supports derived from solid wastes provided larger specific surface areas, thereby enhancing the NH 3 adsorption and redox capacity and facilitating the active ingredients loaded uniformly. Meanwhile, some useful impurities in solid wastes might also facilitate the NH 3 -SCR performance, achieving denitrification efficiency comparable to other catalysts made from costly materials. Moreover, most of these NH 3 -SCR catalysts performed significant SO 2 and/or H 2 O tolerance via metal oxides-doping, which would expand their potential for practical application in industry. Finally, the prospects for the application of solid wastes in NH 3 -SCR catalysts were also proposed. [Display omitted] • The preparation of SCR catalysts from solid wastes was reviewed. • The concept of treating waste gases with solid wastes was emphasized. • Mechanisms of removing NO x with solid waste catalysts were revealed. • The develop direction of solid waste catalysts was pointed out. [ABSTRACT FROM AUTHOR]