The Boeing 737 MAX crisis and COVID-19 pandemic have seriously influenced the development of China’s aircraft leasing industry in the past two years. This paper applies system dynamics theory to explore the sustainable development of China’s aircraft leasing industry. It analyses the dynamic mechanism and constructs a system dynamics model. Based on China’s macroeconomic data and historical data from the financial, aviation, and leasing industries, it aims to stimulate the development of China’s aircraft leasing industry in the next five years. Through sensitivity analysis, this research finds that changes in GDP growth have the most obvious impact on the sustainable development of China’s aircraft leasing industry. Reducing the average financing cost and the income tax rate of aircraft leasing companies, increasing their investment in talent, and controlling risk will increase the market share of China’s aircraft leasing companies and promote the development of the industry. However, increasing the number of aircraft leasing companies has little effect on market share. On this basis, this paper proposes policy recommendations to promote the sustainable development of China’s aircraft leasing industry.