In order to remove Cr6+ in industrial wastewater, this paper used industrial waste material such as lithium-slag to do adsorption experiments so as to explore the influence of pH, temperature, initial concentration on removal rate.The study showed that the optimum pH value range is 3.5-4.0, and pH value gradually increased with the gradual adsorption of Cr6+. The relationship of particle diffusion model, quasi-one rate equation, quasi-two rate equation for adsorbing Cr6+ of dynamic equations is better under different temperatures.The optimal temperature is 40℃,which conform Langmuir and Freundlich isotherm model.The maximum adsorption capacity is 3.785 mg/g.Component analysis showed that the content of FeO in lithium-slag decreases by 0.2% and that of Cr3+ and Cr6+ increases 0.2022% and 0.0309% respectively,which indicate that the adsorption of lithium-slag to acidic Cr6+ contains two effects of restoration and adsorption.FeO in lithium-slag acted as a reducing agent that reduces concentration of Cr6+.Cr3+ is removed from water with adsorption effect of lithium slag. The lithium-slag of adsorbing Cr6+ and cement are used as cementing material prepared into test piece which can meet class III of surface water and groundwater after conserved 3 months.