The invention provides a method for making alkali by the utilization of hydrometallurgical industrial wastewater. The method comprises the following steps: pretreatment of wastewater; triple-effect evaporation treatment; dissolution refining process and repeated centrifugal refining and the like. Then, alkali which accords with the national standards is prepared. According to the invention, high-salinity wastewater from hydrometallurgy is evaporated to separate water from salt. Water can meet enterprise reuse and discharge requirements; and salt is used in production of sodium bicarbonate and soda ash and resource reutilization is realized. The method can promote our national hydrometallurgy enterprises to develop in the direction of energy conservation and environmental protection and also can be used in treatment of high-salinity wastewater in relevant industries.