By constantly making achievements and keeping pace with the trend, the “Belt and Road” initiative is embracing innovations in the process of its development. Among these innovations, China-Myanmar economic corridor, which was promoted by Minister Wang Yi during the visit to Myanmar in November 2017, not only reinvents the “Belt and Road” framework, but also announces new breakthroughs in the principle of “amity, sincerity, mutual benefits, and inclusiveness”. It inherits and carries forward the traditional “friendship” between the two countries and is conducive to the consolidation of comprehensive strategic cooperation by promoting Yunnan-Myanmar cooperation with an emphasis on infrastructure development. Under such background, we can see it is necessary to conduct analyses on the forming Mechanism of China-Myanmar Economic Corridor, and unfold scientific, concrete discussions. However, many shortcomings exist in the related literature. This paper, by adopting the theory of transboundary economic corridor, discusses the formation mechanism of China-Myanmar economic corridor. The background of the China-Myanmar Economic Corridor gives the shape to a schematic map of the corridor that combines the concept of the Minister and the specific situation. This paper discusses in detail of the following four things: cross-border traffic and border ports, the difference of economic growth and the complementarity of industrial structure, intergovernmental communication and each government’s determination, and public support and security environment. The paper figures out that the advantages of advancing “the Belt and Road” initiative and the China-Myanmar economic corridor lies in the benign China-Myanmar communication, strong determination to develop the corridor, fundamental border ports and cross-border traffic, and huge difference in economic development levels and high complementarity in industrial structure. The shortcomings are that, however, the society in Myanmar is not stable, and has many disturbing factors such as politics-military game, extreme nationalism and regional rebels. What makes it worse is that the public with little knowledge of the corridor are easy to get misled which thus become relatively cautious and conservative about “the Belt and Road” initiative. In terms of the weakness and strength of establishing China-Myanmar economic corridor, this paper furtherly puts forward some suggestions.