Abstract: With the development of economic globalization and regional integration, the air transportation liberalization of the world is becoming more and more and important. With the developing mergers and acquisitions trend in the era of post-crisis caused by financial turmoil and debt crisis,there is a good opportunity to participate in and to speed up the process of aviation liberalization for the emerging economies. Based on the development effect of the developing course of air transportation liberalization and the mergers and acquisitions trend in the era of post-crisis, the article analyzes the mergers and acquisitions trend in the context of the global financial crisis and discusses the opportunity of international expansion modes of cross-border merger and acquisition of civil aviation. The results indicate that the era of post-crisis provides a good opportunity for China to accelerate its aviation liberalization. The civil aviation enterprises can expand their international aviation market of long distances transportation by using diversified strategies, thus achieve greater development in the global aviation liberalization.