Abstract: It is known that repeated flight tests are needful for Airworthiness Certification of civil aircraft noise.However,each time of takeoff and landing of the aircraft consumes large amount of fuel and produces loud noise.In order to reduce the cost of airworthiness certification and the noise impacting on airport environment,based on the CAAC aircraft types and the regulations of airworthiness certification of aircraft noise,a certain aircraft's takeoff and approaching noise data and the corresponding takeoff and landing procedures are analyzed to get the equivalent flight procedures and paths,which can be accepted by the airworthiness certification.The use of the obtained equivalent flight paths is of great significance for reducing the cost of the airworthiness certification for domestic aircraft and the noise pollution of airport environment.