The salt separation effect of DTNF nanofiltration membrane was tested at recovery rate of 70%,80% and 90%,and the high-level oxidation was selected to purify the coal chemical high salt wastewater from Xinjiang after HERO concentra-tion.The pilot test results showed that DTNF nanofiltration membrane had a good salt separation effect for HERO high con-centration salt wastewater;the purity of sodium chloride crystal salt after upgrading was ≥98.5%,which met the first grade standard of refined industrial dry salt in Industrial Salt（GB/T 5462—2015）;the purity of sodium sulfate crystal salt was ≥98%,which met the first grade standard in Class Ⅱ of Industrial Anhydrous Sodium Sulfate（GB/T 6009—2014）.