Abstract:  The treatment of high-salt wastewater in the petroleum industry has become a critical point restricting the green development of enterprises. To achieve effective disposal and resource utilization of high-salt wastewater, a coupled process of electrodialysis (ED) and bipolar membrane electrodialysis (BMED) was constructed. A complete process study was conducted on simulated and actual high-salt wastewater from the petroleum industry, investigating the effects of key parameters such as current density, concentrate/diluent volume ratio, membrane type, operating voltage, and operating current on the desalination efficiency of ED and the production of acid and alkali by BMED. The aim was to simultaneously achieve salt concentration in high-salt wastewater and the preparation of acid and alkali. The results showed that under optimal operating conditions (current density of 35 mA/cm², concentrate/diluent volume ratio of 0.3:3, M3 ion-exchange membrane) in the ED stage, the salt concentration of the concentrate reached 185.72 g/L with the volume reduction rate of 70.6% and the energy consumption of 218.27 kWh/t. In the BMED stage, under constant current mode with an acid/alkali to salt compartment volume ratio of 4:5, hydrochloric acid and sodium hydroxide solutions with a concentration of 2 mol/L could be stably produced. The treatment cost of the entire ED-BMED coupled process was 14.7 RMB/m³,. This technology provides a feasible path for the resource utilization and low-carbon disposal of high-salt wastewater from petroleum drilling.