NOVELTY - Synchronously removing nitrogen and carbon in waste water, comprises e.g. adopting anaerobic digested sludge or denitrification sludge as inoculating sludge, inoculating the sludge in a reactor, controlling the sludge mixed liquid to a concentration of 2000-8000 mg/l, adding ammonium chloride in the sludge mixed solution, sodium nitrite and sodium carbonate water in the anaerobic ammonia oxidizing bacteria, culturing the denitrifying bacteria, and dividing the anaerobic ammonia oxidizing bacteria enrichment culture into three stages.    USE - The method is useful for synchronously removing nitrogen and carbon in waste water.    ADVANTAGE - The method ensures simple and economical removal of nitrogen and carbon in wastewater without environmental pollution.    DETAILED DESCRIPTION - Synchronously removing nitrogen and carbon in waste water, comprises adopting anaerobic digested sludge or denitrification sludge as inoculating sludge, inoculating the sludge in a reactor, controlling the sludge mixed liquid to a concentration of 2000-8000 mg/l, adding ammonium chloride in the sludge mixed solution, sodium nitrite and sodium carbonate water in the anaerobic ammonia oxidizing bacteria, culturing the denitrifying bacteria, dividing the anaerobic ammonia oxidizing bacteria enrichment culture into three stages, controlling the first culture stage ammonia nitrogen, nitrite nitrogen and the total nitrogen concentration to 30 mg/l, 39.6 mg/l and 69.6 mg/l, respectively, controlling pH value to be 7-8, controlling the process speed of a stirrer to 50-200 rpm with a hydraulic retention time of 8-18 hours, removing ammonia nitrogen in culture for 50-150 days with a removing rate of 90%, controlling the second culture stage ammonia nitrogen, nitrite nitrogen and the total nitrogen concentration to 60 mg/l, 79.2 mg/l and 139.2 mg/l, controlling the pH value to 7-8, controlling process speed of the stirrer to 50-200 rpm with water power staying time of 8-18 hours, removing ammonia nitrogen in culture for 50-150 days with a removing rate of 90%, controlling third culturing stage ammonia nitrogen, nitrite nitrogen and total nitrogen concentration to 90 mg/l, 118.8 mg/l and 208.8 mg/l, controlling pH value to 7-8, controlling a processing speed of a stirrer to 50-200 rpm for 8-18 hours, inoculating the sludge in black flocculent shape to red brown, scanning electron microscope observation in a sludge funnel provided with gap, realizing anaerobic ammonia oxidizing bacteria culture using anaerobic ammonium oxidizing bacteria, carrying out anaerobic ammonia oxidizing bacteria culture using enrichment device, dividing mixed flora of enrichment culture into three stages, controlling the first culture stage ammonia nitrogen, nitrite nitrogen and total nitrogen to a concentration of 90 mg/l, 145 mg/l and 235 mg/l with a chemical oxygen demand (COD) concentration to 100 mg/l, controlling the pH value to 7-8, culturing at a speed of 50-200 rpm for 8-18 hours with ammonia nitrogen and nitrite nitrogen removal rate at more than 90%, controlling second culture stage ammonia nitrogen, nitrite nitrogen and total nitrogen to concentration of 90 mg/l, 155 mg/l and 245 mg/l with a COD concentration of 150 mg/l, controlling pH value to 7-8, culturing at process speed of 50-200 rpm for 8-18 hours, culturing for 50-150 to C0D with a removal rate of ammonia nitrogen and nitrite nitrogen reaches 90%, controlling third culturing stage of ammonia nitrogen, nitrite nitrogen and total nitrogen concentration to 90 mg/l, 165 mg/l and 255 mg/l with COD concentration of 200 mg/l, controlling the pH value to be 7-8, controlling process speed of the stirrer of 50-200 rpm for 8-18 hours, controlling C0D to 50-150, removing ammonia nitrogen and nitrite nitrogen more than 90%, and mixing flora to ammonia nitrogen, nitrite nitrogen, COD are removing effect and anaerobic ammonia oxidizing bacteria, denitrifying bacteria.