The military coup in Burma in February 2021, which overthrew the then-legal government, is a member of the Association of Southeast Asian Nations (ASEAN), and its internal political turmoil will affect ASEAN’s regional security and peace and stability. In addition, China, the U.S., Russia, and other major powers are all highly concerned about the Myanmar coup and the development of ASEAN regional security and are waiting for the opportunity to act in their best interests. This publication will analyze the impact and trend of the coup in Burma from the beginning and end of the coup, the attitude of various sectors toward the coup, and the impact of the coup on regional security in Southeast Asia.