In order to meet the demand for co-utilization of industrial solid waste to solidify red mud, this paper added industrial solid waste materials such as slag and silica fume to red mud, and used the NaOH initiation reaction system to co-solidify red mud. The strength, resistivity, hydration products and microstructure of solidified red mud were tested by using unconfined compressive strength testing machine, digital AC bridge, X-ray diffractometer, scanning electron microscope and synchronous thermal analyzer.The effects of different curing agent ratios, alkali initiators dosage, and curing age on the basic properties of cured red mud were discussed. The results show that the strength of solidified red mud can be improved by both single doping and compound doping of slag and silica ash, and the main function of alkali initiator is to stimulate the potential gelling activity of red mud. By optimizing the test ratio, the effect of compound doping slag and silica ash in red mud is the best, and the unconfined compressive strength is used as the evaluation index, when the content of slag, sodium hydroxide and silica ash is 15%, 3% and 3%, respectively, the 28d unconfined compressive strength of solidified red mud reaches up to 13.12MPa.