Compared with the international aviation security convention and other country’s law, many problems were found in the legal system of Chinese air marshals, such as power conflicts of varieties aviation security officers, lack of laws and regulations, the fuzziness of legal nature and its powers and duties. The Event of Malaysian Airlines highlights the importance and necessity of establishing and improving the legal status of air marshals. For the healthy and orderly development of China's civil aviation industry, we need to fully coordinate the power among all the aviation security subjects, improve the laws and regulations, clear the legal nature of air marshals and their powers and duties, then improve the legal status of Chinese air marshals.