Abstract
The domestic air freight flows decreased in recent years though it increased repidly at the end of 1980s. This paper discusses the service level of airline and the item component that influence on domestic air freight flow. Airlines are classifed into four main groups by their service level. To each airline, it is considered that the change of item component and the change of air freight flow in different collecting time. It is clear that perishables has increased year by year and an air schedule is inconsistent with a demand of air freight flow.