The phthalazinone ether sulfone ketone (QAPPESK) NF membrane has been successfully applied for the treatment of sulfur black dye wastewater with reuse of inorganic salts. This membrane shows good performance with high dye rejection, salt rejection,and thermal resistance. However, the feed is pretreated with a sand funnel and a PPESK UF membrane with a PEG 10000 rejection of 93% and a pure water flux of 183 L m-2 h-1 at 0.1 MPa and 20 ◦C,which are used to decrease the fouling potential of suspended solids for the long term process of NF. With this membrane, salts primarily composed of Na2S2O3, can pass through the membrane, which greatly decreases the osmotic pressure. Therefore, Na2S2O3 and water from the effluent of the membrane process can be reused. Over 14.5 L m-2 h-1 flux, 92.3% dye rejection, and 10% inorganic salt rejection are observed in the long term operation at 60 ◦C. In addition, the flux decreases by approximately 25% after 12 h of operation, which indicates that the hydrophilic membrane has a distinct fouling resistance.