In order to recycle a large number of sodium sulfate and sodium chloride in high salt wastewater to and realize the utilization of salt resources meet the needs of environmental protection, it is imperative to study the salt separation treatment process of high salt wastewater. Four separation processes of high salt wastewater containing sodium sulfate and sodium chloride were introduced, which are high-temperature nitrate and low temperature salt method, hot steaming-freezing
-hot steaming method, nanofiltration-two step hot steaming method, nanofiltration-hot steaming -freeze / hot steaming method. These four processes can realize the resource of crystallized salt, the reduction of solid waste and the recycling of all water; crystalline salt sodium chloride and sodium sulfate can be reused or sold as industrial grade salt.