The classification of aircraft types is the foundation and basis in the wake turbulence separation calculation. Aviation control institutions now in our country are all just the same to ICAO in the classification standards of aircraft types, i.e. the weight of aircraft. In the RECAT proposed by Europe and the United States, the classification of aircraft type and standard of wake turbulence separation have been readjusted according to some parameters such as maximum takeoff weight and wingspan. In this paper, priority is given to the current classification method of aircraft type adopted by aviation control institutions and RECAT 1.5, RECATEU classification method of aircraft types in order to achieve the establishment of the aircraft circulation calculation model, calculate and analyze the circulation in the approachandlanding stage of fortythree common aircraft types, thus putting forward a RECATNEW aircraft type classification in terms of circulation. The calculation indicates that in the RECATNEW classification method of aircraft type, the average absolute deviation and standard deviation of the classification range for various aircraft types are less than those values in the RECAT 1.5 and RECATEU classification ranges, and can further be satisfied for the study requirements of RECAT.