The Marshall Plan is a core part of the postwar U.S. global hegemonic strategy, and its influence to the postwar world and international structure is profound and lasting. Thus, it has been a research focus in academic fields so far. Based on an interpretation of historical facts, this paper has dealt with several disputes concerning the Marshall Plan in academic studies at home and abroad, such as the definition of the beginning of the Marshall plan, the evolution of the name of the plan, the historical contribution of officials from U.S. Department of State to the plan and whether the “Czech Coup” in 1948 had any relationship with the plan. This paper holds that: although Marshall’s Harvard Address has been regarded as a symbol of the beginning of the Marshall Plan, the United States had no concrete plan to aid Europe in strict sense before April 1948; During the formulation of the Marshall Plan, the American decision-making elite did play a leading role, yet the middle-level and junior officials from U.S. Department of State made no less contribution at the same time; The “Czech Coup” in 1948 was an accident with no direct relation to the Marshall Plan, yet it offered aid to the passing of the Marshall Plan by U.S. Congress objectively. The paper is an essential addendum to and improvement on the overall research on the Marshall Plan history and has important value for further study on this plan.