The research of ad-hoc network based on Chinese airspace flight topology will help to meet the needs of future flights on aspects of air traffic control and information sharing，but the existing studies has not analysis the flights topology according to the specific condition of Chinese airspace. This paper collects real Chinese airspace domestic flights data and divides the Chinese airspace into east part，west part， and flight information region with NS2 simulation，and compares Chinese airspace flight topology within one day and 24 hours. The results showed that the distributions of Chinese domestic flights have big differences with each other in the Chinese airspace，however，the number of the flights shows a relative high linear correlation with the population and the third output.
