Due to the vigorous development of domestic flight training aviation schools, how to improve the efficiency of flight training has become a hot issue. Using the flight training data of a certain aviation school from 2017 to 2022, the time series analysis of the data is carried out using the data envelopment analysis (DEA)method, and the grey correlation degree model is used to sort the influencing factors. The research results show that DEA is effective in 2017, 2018, 2019, 2021 and 2022, and DEA is not effective in 2020. The results of DEA model are analyzed in terms of relative effectiveness, scale effectiveness and technical effectiveness. Improvement values are put forward from various inputs and outputs in 2020, the impact of input and output indicators on the comprehensive efficiency of flight training through grey correlation model is ranked ,the results obtained are analyzed , and improvement suggestions are put forward.