Main features of purification of recycled water of industrial enterprises have been considered. It has been shown that using membrane methods of purification allows to remove of dissolved metals salts from recycled water and to bring their concentration to standardized level. Using this method doesn’t require such large energy consumption as evaporation method. The analyze of membrane purification methods have been fulfilled. Mathematical model of this process has been developed. The solution algorithm has been developed and some results of simulation of membrane purification have been presented.