Electrolytic removal of ammonia was investigated by using zeolite packed electrolysis reactor in batch mode. The results showed that 27.8 mg N/L ammonia could be removed to a concentration as low as 0.3 mg N/L within 1 h. Nitrite, nitrate and chloramines were determined to be 0.02 mg N/L, 3.9 mg N/L and 15.8 mg Cl/L, respectively, which accounted for a total nitrogen removal of 80% after 1.5 h of electrolysis. The main components and crystalline structure of the packed zeolite were found to be unchanged after long time of electrolysis. The specific surface area and pore volume of zeolite increased from 15.9 m²/g and 0.05 cm³/g to 42.6 m²/g and 0.08 cm³/g, respectively, which might be caused by the removal of impurities and formation of new channels and cavities during electrolysis. The adsorption capacities of zeolite for ammonia before and after electrolysis were close.