The invention discloses a treating method for continuously removing ammonia nitrogen in wastewater with high efficiency. The treating method comprises the following steps: firstly, compressed air is charged from an inlet of a wastewater inlet pipe, and wastewater is injected into a wastewater mixing reactor through a high pressure nozzle; and secondly, a denitrifier is added into the mixing reactor, the pH value of the mixed liquor is controlled to between 5 and 12 after the wastewater is mixed with the denitrifier, and the upper part of the mixed reactor is in negative pressure state; and finally the mixed wastewater flows out of a venturi tube and flows into a stripping tank with a corridor type gallery structure for aeration and stripping. The treating method is characterized by simpleoperation, continuous and high-efficiency removal of ammonia nitrogen in the wastewater, large treating amount, few impacting factors, low operating cost, stability, and the like. The wastewater withhigh or low ammonia nitrogen concentration has the ammonia nitrogen concentration below 5 mg/L after one-time treatment.