Abstract The aim of this paper is to analyze the reason why Germany serves as a driving force in European integration. Germany has been playing a vital role in the process of European integration, and all post-war governments of Germany regard integration as the core of its foreign policy. In order to revive Germany, Adenauer vigorously promoted European integration, ultimately laid the foundation of reconstruction. After the unification of Germany, Germany government continued to propel integration, and eliminated the fear of other nations to Germany, ensuring the center state of Germany in EU. At present, integration is in the procedure of deepening and enlargement; the new century Germany European integration concerns its impact and function in Europe or even in the world, which has a significant element of judgment of the European strategy situation and strength. Thus, this thesis gives a brief introduction of the German historical overview of European integration, takes two typical cases as the sample, analyses their backgrounds, cause, process and outcome, in the end, summarizes the deep reason of Germany promoting integration. KEY WORDS: European integration, Germany policy, driving factor, Germany