Abstract: Backfill binder is the key to the extensive application of cemented backfill technology in the large-scale exploitation and deep mining of mineral resources.Cement，which is used as the most common binder，has the problems of high energy consumption in production and high backfill cost.Using the industrial solid wastes with potential cementitious activity to prepare binder can lower the cost，improve the performance of backfill material and enhance the comprehensive utilization of solid wastes.Based on the kinds of industrial solid wastes，the application of steel slag，blast furnace slag，fly ash and non-ferrous metallurgical slag in preparing the binder was introduced.The activation methods of industrial solid wastes cementitious activity are mechanical activation and chemical activation.The activation mechanism and application of two activation methods were discussed，respectively.Lastly，the effects of binder prepared with industrial solid wastes on the strength，stability and environmental safety of backfill materials were analyzed.

Key words: Cemented backfill, Backfill binder, Industrial solid wastes, Cementitious activity