NOVELTY - Cultivation method of anammox granular sludge comprises simultaneously inoculating aerobic granular sludge and anammox seed sludge into expanded granular sludge bed (EGSB) reactor; supplying nitrogenous simulated wastewater, gradually increasing concentrations of ammonia nitrogen and nitrite nitrogen in intake water when the synchronous removal rate of ammonia nitrogen and nitrite nitrogen is above 80%; keeping stable the intake water concentrations of ammonia nitrogen and nitrite nitrogen are kept stable, and gradually shortening the hydraulic retention time to 2.6 hours.    USE - Cultivation method of anammox granular sludge.    ADVANTAGE - Problems that the existing high-efficiency anammox granular sludge is difficult to cultivate, and the cultivation time is long, are solved. With the method, the reactor can be started successfully within 20 days, and the high-efficiency anammox granular sludge can be obtained within 89 days.    DETAILED DESCRIPTION - Cultivation method of anammox granular sludge comprises:    (A) simultaneously inoculating aerobic granular sludge and anammox seed sludge at a volume ratio of 1:(2.0-2.3) in EGSB reactor, where total volume of the aerobic granular sludge and anaerobic ammonia oxidation mud is 28-35% of the reactor;    (B) controlling dissolved oxygen concentration to be 0-0.08 mg/L, and pH value to be 7.5-8.3, supplying nitrogenous simulated wastewater at 3.0 m/hour into EGSB reactor, processing at 30-35 degrees C, controlling hydraulic retention time to be 12 hours, when ammonia nitrogen and nitrite nitrogen synchronous removal rate is more than 80%, gradually increasing concentrations of ammonia nitrogen and nitrite nitrogen in intake water, controlling the nitrite nitrogen and ammonia nitrogen concentration ratio to be 1-1.32: 1 until the simulated wastewater containing nitrogen nitrite nitrogen concentration increased to more than 200 mg/L; and    (C) when ammonia nitrogen and nitrite nitrogen synchronous removal rate is more than 80%, controlling simulated wastewater nitrite nitrogen and ammonia nitrogen ratio to be 1.32: 1 until the residence time is shortened to 2.6 hours, i.e. finishing the anaerobic particle sludge.