The Tatmadaw is facing domestic and international legitimacy crisis as it takes over power again. This paper attempts to observe the current dilemma in Myanmar from the perspective of discourse analysis. Based on the definition and relation of political discourse，political persuasion and political mobilization，this paper uses the corpus software WordSmith to sort out the corpus and count the word frequency of the political discourse of the Tatmadaw government represented by Min Aung Hlaing，makes a comparative observation of the Tatmadaw government’s actions in domestic and foreign affairs. It finds that political persuasion and mobilization are the main features of Min Aung Hlaing’s political discourse. The political persuasion mainly uses discourse frameworks and strategies to expose and accuse the NLD and its leaders of political misconduct and illegal acts，while establishing the image of the Tatmadaw government as upholding the 2008 Constitution，protecting state power and upholding multiparty democratic system，in order to enhance the legitimacy of taking power. The political mobilization closely centers on “Five Steps Roadmap” and “Nine Objectives”，combines the mobilization topic with ceremonies，and targets at the public，military groups，local officials and news media. Its ultimate goal is to integrate social forces，promote political participation and maintains social order and stability.