Structure and scope of work. The work consists of an introduction, 3 chapters, conclusions and a list of used literature sources with 47 titles, 10 tables, 29 figures, the total volume - 82 pages. The aim of the study. The aim of the work is to substantiate the parameters of the desalination plant based on reverse osmosis technology. The object of research is the processes of demineralization of mine wastewater. The subject of research - technological parameters of demineralization by reverse osmosis. The scientific significance of the work is to substantiate the parameters of the choice of desalination technology of highly mineralized wastewater by reverse osmosis on the territory of the mine complex or the area of water discharge in the conditions of lack of water resources in the region. The practical significance of the work lays in following: •in the development of methods for selecting the capacity of desalination equipment depending on the volume of water intake, its use in cost planning and capital investment in the industrial desalination complex; •in the development of methods for quantitative assessment of the use of industrial wastewater filtration systems in accordance with geographical, chemical, economic and geological parameters depending on the local water and industrial load.