【Abstract】 Objective To understand the background of flies at Qingdao airport, and to provide a scientific evidence for surveillance and control of medical?vector. Methods The flies were caught by cage trap at the Qingdao airport from June 2006 to May 2008. Results A total of 46 726 flies were collected, which belonged to 7 families, 47 genera and 98 species. Among them, 30 new records were found. Conclusion It is necessary to know species composition, which provides scientific evidence for the control and the finding of new records at Qingdao airport.