Abstract: There is a high concentration of ammonia nitrogen in the wastewater from etching solution treatment, which is difficult to treat and has a high risk of environmental pollution. Electrochemical oxidation has been widely valued by the academic circles because of its rapid and efficient processing efficiency. The mechanism and influencing factors of removal of high nitrogen wastewater by electrochemical oxidation were systematically studied in this paper. The results show that the optimal conditions for removing ammonia nitrogen from simulated ammonia nitrogen wastewater with initial mass concentration of 2000 mg·L⁻¹ are mass concentration \rho _\textCl^- =6000 mg·L⁻¹, initial pH=9, current density 60 mA·cm⁻² by electrochemical oxidation, and the removal rate reaches 86.87% after 3 h of electrolysis. In view of the actual wastewater, the removal rate of ammonia nitrogen can reach 75.42%. In addition, the removal efficiency of ammonia nitrogen in simulated wastewater and actual wastewater can be increased to 92.79% and 83.17% respectively after zeolite material is introduced into the electrochemical system.