Departure and arrival procedures of an airport will be changed along with the increasing of air traffic flow and the changing of airspace structure. Based on the present departure and arrival procedures of this airport, aimed at optimizing the procedures and decreasing the unwanted conflicts resulting from the present procedures, this paper chooses Xiamen Gaoqi International airport as the research object. This research solves the conflicts to a certainty and the departure and arrival procedures were separated efficiently to optimize the departure and arrival procedures properly. Other airport which has the same situation can be treated in the same method and thought.