NOVELTY - Removing carbon and nitrogen pollutants in wastewater using heterotrophic ammonia oxidation bacteria (HAOE), involves inoculating natural soil containing HAOE in culture medium containing organic carbon and nitrogen substance and/or inorganic ammonia nitrogen under aerobic conditions in a reactor, inoculating the activated sludge obtained after the above culture process into a biochemical reactor which contains wastewater, and performing denitrification reaction.    USE - The method is useful for removing carbon and nitrogen pollutants in wastewater such as coking wastewater (claimed).    ADVANTAGE - The method enables efficient removal of carbon and nitrogen pollutants in wastewater in a single reactor.    DETAILED DESCRIPTION - Method for removing carbon and nitrogen pollutants in wastewater using heterotrophic ammonia oxidation bacteria (HAOE), involves inoculating natural soil containing HAOE in culture medium containing organic carbon and nitrogen substance and/or inorganic ammonia nitrogen under aerobic conditions in a reactor, where the organic carbon source is fed into the culture medium in batch, the pH is controlled to 6.5-8.5, the aeration is stopped when ammonia nitrogen concentration is greater than or equal to 3 mg/l and accumulation of NO2--N reaches the maximum value; and removing carbon and nitrogen pollutant in wastewater by inoculating the activated sludge obtained after the above culture process into a biochemical reactor which contains wastewater containing organic carbon and nitrogen substance and/or inorganic ammonia nitrogen pollutant, aerating, if no organic carbon is present in wastewater, feeding organic carbon source, performing ammoxidation reaction; stop aerating when accumulation of NO2--N begins, maintaining anoxia state, feeding organic carbon source, and performing denitrification reaction until no NO2--N is accumulated. The HAOE is capable of growing in PM plate, is Griess reagent positive, and is capable of directly oxidizing ammonia into nitrogen gas, NO2- or NO3- in the presence of organic carbon source under aerobic conditions, and removing nitrogen by denitrification under aerobic or anoxia condition.